A Misdelivery
#include<bits/stdc++.h>
#include<atcoder/all>
using namespace std;
using namespace atcoder;
#define For(i,n) for(int i=1;i<=n;i++)
#define Fork(i,k,n) for(int i=k;i<=n;i++)
#define ForkD(i,k,n) for(int i=n;i>=k;i--)
#define Rep(i,n) for(int i=0;i<n;i++)
#define ForD(i,n) for(int i=n;i;i--)
#define RepD(i,n) for(int i=n;i>=0;i--)
#define Forp(x) for(int p=pre[x];p;p=next[p])
#define Forpiter(x) for(int &p=iter[x];p;p=next[p])
#define Lson (o<<1)
#define Rson ((o<<1)+1)
#define MEM(a) memset(a,0,sizeof(a));
#define MEMI(a) memset(a,0x3f,sizeof(a));
#define MEMi(a) memset(a,128,sizeof(a));
#define MEMx(a,b) memset(a,b,sizeof(a));
#define INF (0x3f3f3f3f)
#define F (1000000007)
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define vi vector<int>
#define pi pair<int,int>
#define SI(a) ((a).size())
#define Pr(kcase,ans) printf("Case #%d: %lld\n",kcase,ans);
#define PRi(a,n) For(i,n-1) cout<<a[i]<<' '; cout<<a[n]<<endl;
#define PRi2D(a,n,m) For(i,n) { \
For(j,m-1) cout<<a[i][j]<<' ';\
cout<<a[i][m]<<endl; \
}
#pragma comment(linker, "/STACK:102400000,102400000")
#define ALL(x) (x).begin(),(x).end()
#define gmax(a,b) a=max(a,b);
#define gmin(a,b) a=min(a,b);
#ifdef DEBUG
#define _GLIBCXX_DEBUG
#endif
#define DEBUG
int recur_depth = 0;
#ifdef DEBUG
#define dbg(x) {++recur_depth; auto x_=x; --recur_depth; cerr<<string(recur_depth, '\t')<<"\e[91m"<<__func__<<":"<<__LINE__<<"\t"<<#x<<" = "<<x_<<"\e[39m"<<endl;}
#else
#define dbg(x)
#endif
template<typename Ostream, typename Cont>
typename enable_if<is_same<Ostream,ostream>::value, Ostream&>::type operator<<(Ostream& os, const Cont& v){
os<<"[";
for(auto& x:v){os<<x<<", ";}
return os<<"]";
}
template<typename Ostream, typename ...Ts>
Ostream& operator<<(Ostream& os, const pair<Ts...>& p){
return os<<"{"<<p.first<<", "<<p.second<<"}";
}
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
ll mul(ll a,ll b){return (a*b)%F;}
ll add(ll a,ll b){return (a+b)%F;}
ll sub(ll a,ll b){return ((a-b)%F+F)%F;}
void upd(ll &a,ll b){a=(a%F+b%F)%F;}
inline int read()
{
int x=0,f=1; char ch=getchar();
while(!isdigit(ch)) {if (ch=='-') f=-1; ch=getchar();}
while(isdigit(ch)) { x=x*10+ch-'0'; ch=getchar();}
return x*f;
}
vi c[200000+10];
int main()
{
int t=read();
vector<string> v(t+1);
For(i,t) cin>>v[i];
int p=read();string g;cin>>g;
puts(v[p]==g?"Yes":"No");
return 0;
}
B Fibonacci Reversed
#include<bits/stdc++.h>
#include<atcoder/all>
using namespace std;
using namespace atcoder;
#define For(i,n) for(int i=1;i<=n;i++)
#define Fork(i,k,n) for(int i=k;i<=n;i++)
#define ForkD(i,k,n) for(int i=n;i>=k;i--)
#define Rep(i,n) for(int i=0;i<n;i++)
#define ForD(i,n) for(int i=n;i;i--)
#define RepD(i,n) for(int i=n;i>=0;i--)
#define Forp(x) for(int p=pre[x];p;p=next[p])
#define Forpiter(x) for(int &p=iter[x];p;p=next[p])
#define Lson (o<<1)
#define Rson ((o<<1)+1)
#define MEM(a) memset(a,0,sizeof(a));
#define MEMI(a) memset(a,0x3f,sizeof(a));
#define MEMi(a) memset(a,128,sizeof(a));
#define MEMx(a,b) memset(a,b,sizeof(a));
#define INF (0x3f3f3f3f)
#define F (1000000007)
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define vi vector<int>
#define pi pair<int,int>
#define SI(a) ((a).size())
#define Pr(kcase,ans) printf("Case #%d: %lld\n",kcase,ans);
#define PRi(a,n) For(i,n-1) cout<<a[i]<<' '; cout<<a[n]<<endl;
#define PRi2D(a,n,m) For(i,n) { \
For(j,m-1) cout<<a[i][j]<<' ';\
cout<<a[i][m]<<endl; \
}
#pragma comment(linker, "/STACK:102400000,102400000")
#define ALL(x) (x).begin(),(x).end()
#define gmax(a,b) a=max(a,b);
#define gmin(a,b) a=min(a,b);
#ifdef DEBUG
#define _GLIBCXX_DEBUG
#endif
#define DEBUG
int recur_depth = 0;
#ifdef DEBUG
#define dbg(x) {++recur_depth; auto x_=x; --recur_depth; cerr<<string(recur_depth, '\t')<<"\e[91m"<<__func__<<":"<<__LINE__<<"\t"<<#x<<" = "<<x_<<"\e[39m"<<endl;}
#else
#define dbg(x)
#endif
template<typename Ostream, typename Cont>
typename enable_if<is_same<Ostream,ostream>::value, Ostream&>::type operator<<(Ostream& os, const Cont& v){
os<<"[";
for(auto& x:v){os<<x<<", ";}
return os<<"]";
}
template<typename Ostream, typename ...Ts>
Ostream& operator<<(Ostream& os, const pair<Ts...>& p){
return os<<"{"<<p.first<<", "<<p.second<<"}";
}
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
ll mul(ll a,ll b){return (a*b)%F;}
ll add(ll a,ll b){return (a+b)%F;}
ll sub(ll a,ll b){return ((a-b)%F+F)%F;}
void upd(ll &a,ll b){a=(a%F+b%F)%F;}
inline int read()
{
int x=0,f=1; char ch=getchar();
while(!isdigit(ch)) {if (ch=='-') f=-1; ch=getchar();}
while(isdigit(ch)) { x=x*10+ch-'0'; ch=getchar();}
return x*f;
}
int main()
{
ll x,y,z;
cin>>x>>y;
For(i,8) {
z=x+y;
stringstream ss,ss2;
ss<<z;
string s;
ss>>s;
reverse(ALL(s));
ss2<<s;
ss2>>z;
x=y,y=z;
}
cout<<y<<endl;
return 0;
}
C Alternated
#include<bits/stdc++.h>
#include<atcoder/all>
using namespace std;
using namespace atcoder;
#define For(i,n) for(int i=1;i<=n;i++)
#define Fork(i,k,n) for(int i=k;i<=n;i++)
#define ForkD(i,k,n) for(int i=n;i>=k;i--)
#define Rep(i,n) for(int i=0;i<n;i++)
#define ForD(i,n) for(int i=n;i;i--)
#define RepD(i,n) for(int i=n;i>=0;i--)
#define Forp(x) for(int p=pre[x];p;p=next[p])
#define Forpiter(x) for(int &p=iter[x];p;p=next[p])
#define Lson (o<<1)
#define Rson ((o<<1)+1)
#define MEM(a) memset(a,0,sizeof(a));
#define MEMI(a) memset(a,0x3f,sizeof(a));
#define MEMi(a) memset(a,128,sizeof(a));
#define MEMx(a,b) memset(a,b,sizeof(a));
#define INF (0x3f3f3f3f)
#define F (1000000007)
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define vi vector<int>
#define pi pair<int,int>
#define SI(a) ((a).size())
#define Pr(kcase,ans) printf("Case #%d: %lld\n",kcase,ans);
#define PRi(a,n) For(i,n-1) cout<<a[i]<<' '; cout<<a[n]<<endl;
#define PRi2D(a,n,m) For(i,n) { \
For(j,m-1) cout<<a[i][j]<<' ';\
cout<<a[i][m]<<endl; \
}
#pragma comment(linker, "/STACK:102400000,102400000")
#define ALL(x) (x).begin(),(x).end()
#define gmax(a,b) a=max(a,b);
#define gmin(a,b) a=min(a,b);
#ifdef DEBUG
#define _GLIBCXX_DEBUG
#endif
#define DEBUG
int recur_depth = 0;
#ifdef DEBUG
#define dbg(x) {++recur_depth; auto x_=x; --recur_depth; cerr<<string(recur_depth, '\t')<<"\e[91m"<<__func__<<":"<<__LINE__<<"\t"<<#x<<" = "<<x_<<"\e[39m"<<endl;}
#else
#define dbg(x)
#endif
template<typename Ostream, typename Cont>
typename enable_if<is_same<Ostream,ostream>::value, Ostream&>::type operator<<(Ostream& os, const Cont& v){
os<<"[";
for(auto& x:v){os<<x<<", ";}
return os<<"]";
}
template<typename Ostream, typename ...Ts>
Ostream& operator<<(Ostream& os, const pair<Ts...>& p){
return os<<"{"<<p.first<<", "<<p.second<<"}";
}
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
ll mul(ll a,ll b){return (a*b)%F;}
ll add(ll a,ll b){return (a+b)%F;}
ll sub(ll a,ll b){return ((a-b)%F+F)%F;}
void upd(ll &a,ll b){a=(a%F+b%F)%F;}
inline int read()
{
int x=0,f=1; char ch=getchar();
while(!isdigit(ch)) {if (ch=='-') f=-1; ch=getchar();}
while(isdigit(ch)) { x=x*10+ch-'0'; ch=getchar();}
return x*f;
}
int main()
{
int n;string s;
cin>>n>>s;
ll ans;
{
int a=0,b=1;
ll p=0;
Rep(i,2*n){
if(s[i]=='A') {
p+=abs(i-a);a+=2;
}else {
p+=abs(i-b);b+=2;
}
}
ans=p;
}
{
int a=1,b=0;
ll p=0;
Rep(i,2*n){
if(s[i]=='A') {
p+=abs(i-a);a+=2;
}else {
p+=abs(i-b);b+=2;
}
}
gmin(ans,p)
}
cout<<ans/2;
return 0;
}
D RLE Moving
#include<bits/stdc++.h>
#include<atcoder/all>
using namespace std;
using namespace atcoder;
#define For(i,n) for(int i=1;i<=n;i++)
#define Fork(i,k,n) for(int i=k;i<=n;i++)
#define ForkD(i,k,n) for(int i=n;i>=k;i--)
#define Rep(i,n) for(int i=0;i<n;i++)
#define ForD(i,n) for(int i=n;i;i--)
#define RepD(i,n) for(int i=n;i>=0;i--)
#define Forp(x) for(int p=pre[x];p;p=next[p])
#define Forpiter(x) for(int &p=iter[x];p;p=next[p])
#define Lson (o<<1)
#define Rson ((o<<1)+1)
#define MEM(a) memset(a,0,sizeof(a));
#define MEMI(a) memset(a,0x3f,sizeof(a));
#define MEMi(a) memset(a,128,sizeof(a));
#define MEMx(a,b) memset(a,b,sizeof(a));
#define INF (0x3f3f3f3f)
#define F (1000000007)
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define vi vector<int>
#define pi pair<int,int>
#define SI(a) ((a).size())
#define Pr(kcase,ans) printf("Case #%d: %lld\n",kcase,ans);
#define PRi(a,n) For(i,n-1) cout<<a[i]<<' '; cout<<a[n]<<endl;
#define PRi2D(a,n,m) For(i,n) { \
For(j,m-1) cout<<a[i][j]<<' ';\
cout<<a[i][m]<<endl; \
}
#pragma comment(linker, "/STACK:102400000,102400000")
#define ALL(x) (x).begin(),(x).end()
#define gmax(a,b) a=max(a,b);
#define gmin(a,b) a=min(a,b);
#ifdef DEBUG
#define _GLIBCXX_DEBUG
#endif
#define DEBUG
int recur_depth = 0;
#ifdef DEBUG
#define dbg(x) {++recur_depth; auto x_=x; --recur_depth; cerr<<string(recur_depth, '\t')<<"\e[91m"<<__func__<<":"<<__LINE__<<"\t"<<#x<<" = "<<x_<<"\e[39m"<<endl;}
#else
#define dbg(x)
#endif
template<typename Ostream, typename Cont>
typename enable_if<is_same<Ostream,ostream>::value, Ostream&>::type operator<<(Ostream& os, const Cont& v){
os<<"[";
for(auto& x:v){os<<x<<", ";}
return os<<"]";
}
template<typename Ostream, typename ...Ts>
Ostream& operator<<(Ostream& os, const pair<Ts...>& p){
return os<<"{"<<p.first<<", "<<p.second<<"}";
}
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
ll mul(ll a,ll b){return (a*b)%F;}
ll add(ll a,ll b){return (a+b)%F;}
ll sub(ll a,ll b){return ((a-b)%F+F)%F;}
void upd(ll &a,ll b){a=(a%F+b%F)%F;}
inline int read()
{
int x=0,f=1; char ch=getchar();
while(!isdigit(ch)) {if (ch=='-') f=-1; ch=getchar();}
while(isdigit(ch)) { x=x*10+ch-'0'; ch=getchar();}
return x*f;
}
bool o(long long x, long long y, long long nx, long long ny) {
if (x == 0 && y == 0) return false;
bool onLine = false;
if (y == ny) {
onLine = (y == 0);
} else if (x == nx) {
onLine = (x == 0);
} else if (nx - x == ny - y) {
onLine = (y == x);
} else if (nx - x == -(ny - y)) {
onLine = (y == -x);
} else {
return false;
}
if (!onLine) return false;
bool xCross = (x < 0 && nx >= 0) || (x > 0 && nx <= 0);
bool yCross = (y < 0 && ny >= 0) || (y > 0 && ny <= 0);
if (y == ny) {
return xCross && (y == 0);
}
if (x == nx) {
return yCross && (x == 0);
}
return xCross && yCross;
}
int main()
{
ll sx,sy,tx,ty;
cin>>sx>>sy>>tx>>ty;
ll n,m,l;cin>>n>>m>>l;
vector<pair<string,int> > op[2];
Rep(i,m) {
string p;int c;
cin>>p>>c;
op[0].pb(mp(p,c));
}
Rep(i,l) {
string p;int c;
cin>>p>>c;
op[1].pb(mp(p,c));
}
if(((sx+sy)%2+2)%2!=((tx+ty)%2+2)%2) {
puts("0");
exit(0);
}
ll x=sx-tx,y=sy-ty;
auto mv = [](string seq, ll steps, ll& x, ll& y)
{
switch (seq[0])
{
case 'U': x -= steps; break;
case 'D': x += steps; break;
case 'L': y -= steps; break;
case 'R': y += steps; break;
}
};
ll ans=0;
ll i[2]={},p[2]={};
ll elen=0;
while(elen!=n) {
Rep(j,2) {
if(i[j]>=op[j][p[j]].se) i[j]=0,++p[j];
}
ll nx=x,ny=y;
ll dis=1e18;
Rep(j,2) gmin(dis,op[j][p[j]].se-i[j])
Rep(j,2) mv(op[j][p[j]].fi,dis*((j==1)?-1:1),nx,ny);
Rep(j,2) i[j]+=dis;
if(x==0 && y==0) {
if(nx==0 &&ny==0) ans+=dis;
}else {
if(o(x,y,nx,ny)) {
++ans;
}
}
x=nx,y=ny;
elen+=dis;
}
cout<<ans<<endl;
return 0;
}
E Yacht
#include<bits/stdc++.h>
#include<atcoder/all>
using namespace std;
using namespace atcoder;
#define For(i,n) for(int i=1;i<=n;i++)
#define Fork(i,k,n) for(int i=k;i<=n;i++)
#define ForkD(i,k,n) for(int i=n;i>=k;i--)
#define Rep(i,n) for(int i=0;i<n;i++)
#define ForD(i,n) for(int i=n;i;i--)
#define RepD(i,n) for(int i=n;i>=0;i--)
#define Forp(x) for(int p=pre[x];p;p=next[p])
#define Forpiter(x) for(int &p=iter[x];p;p=next[p])
#define Lson (o<<1)
#define Rson ((o<<1)+1)
#define MEM(a) memset(a,0,sizeof(a));
#define MEMI(a) memset(a,0x3f,sizeof(a));
#define MEMi(a) memset(a,128,sizeof(a));
#define MEMx(a,b) memset(a,b,sizeof(a));
#define INF (0x3f3f3f3f)
#define F (1000000007)
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define vi vector<int>
#define pi pair<int,int>
#define SI(a) ((a).size())
#define Pr(kcase,ans) printf("Case #%d: %lld\n",kcase,ans);
#define PRi(a,n) For(i,n-1) cout<<a[i]<<' '; cout<<a[n]<<endl;
#define PRi2D(a,n,m) For(i,n) { \
For(j,m-1) cout<<a[i][j]<<' ';\
cout<<a[i][m]<<endl; \
}
#pragma comment(linker, "/STACK:102400000,102400000")
#define ALL(x) (x).begin(),(x).end()
#define gmax(a,b) a=max(a,b);
#define gmin(a,b) a=min(a,b);
#ifdef DEBUG
#define _GLIBCXX_DEBUG
#endif
#define DEBUG
int recur_depth = 0;
#ifdef DEBUG
#define dbg(x) {++recur_depth; auto x_=x; --recur_depth; cerr<<string(recur_depth, '\t')<<"\e[91m"<<__func__<<":"<<__LINE__<<"\t"<<#x<<" = "<<x_<<"\e[39m"<<endl;}
#else
#define dbg(x)
#endif
template<typename Ostream, typename Cont>
typename enable_if<is_same<Ostream,ostream>::value, Ostream&>::type operator<<(Ostream& os, const Cont& v){
os<<"[";
for(auto& x:v){os<<x<<", ";}
return os<<"]";
}
template<typename Ostream, typename ...Ts>
Ostream& operator<<(Ostream& os, const pair<Ts...>& p){
return os<<"{"<<p.first<<", "<<p.second<<"}";
}
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
ll mul(ll a,ll b){return (a*b)%F;}
ll add(ll a,ll b){return (a+b)%F;}
ll sub(ll a,ll b){return ((a-b)%F+F)%F;}
void upd(ll &a,ll b){a=(a%F+b%F)%F;}
inline int read()
{
int x=0,f=1; char ch=getchar();
while(!isdigit(ch)) {if (ch=='-') f=-1; ch=getchar();}
while(isdigit(ch)) { x=x*10+ch-'0'; ch=getchar();}
return x*f;
}
void dfs(vi v) {
}
int main()
{
int n=6;
vi a(6);
Rep(i,n) a[i]=read();
map<pair<int,vi > ,double> h;
auto dfs = [&] (auto self,int T, vi v) -> double{
sort(ALL(v));
if(h.count({T,v})) return h[{T,v}];
if(T==3 || SI(v)==5){
if(SI(v)==5){
T=3;
map<int,int> h1;
for(auto p:v) h1[a[p]]++;
double ans=0;
for(auto [a,b]:h1) gmax(ans,(double)a*b)
return h[{T,v}]=ans;
}else return 0;
}
double ans=0;
int lef=5-SI(v);
int S=1;
For(i,lef) S*=6;
Rep(st,S) {
vi q;
for(int i=0,j=st;i<lef;i++) {
q.pb(j%6);
j/=6;
}
double c=0;
Rep(i,1<<lef) {
auto tmp=v;
Rep(j,lef) if((i>>j)&1) tmp.pb(q[j]);
gmax(c,self(self,T+1,tmp))
}
ans+=c;
}
ans/=S;
return h[{T,v}]=ans;
};
cout<<dfs(dfs,3,{1,2,3,4,5})<<endl;
cout<<setprecision(20)<<fixed<<dfs(dfs,0,{})<<endl;
return 0;
}
F Erase between X and Y
#include<bits/stdc++.h>
using namespace std;
#define For(i,n) for(int i=1;i<=n;i++)
#define Fork(i,k,n) for(int i=k;i<=n;i++)
#define Rep(i,n) for(int i=0;i<n;i++)
#define ForD(i,n) for(int i=n;i;i--)
#define RepD(i,n) for(int i=n;i>=0;i--)
#define Forp(x) for(int p=pre[x];p;p=next[p])
#define Forpiter(x) for(int &p=iter[x];p;p=next[p])
#define Lson (x<<1)
#define Rson ((x<<1)+1)
#define MEM(a) memset(a,0,sizeof(a));
#define MEMI(a) memset(a,127,sizeof(a));
#define MEMi(a) memset(a,128,sizeof(a));
#define INF (2139062143)
#define F (100000007)
#define MAXN (600000+10)
typedef long long ll;
ll mul(ll a,ll b){return (a*b)%F;}
ll add(ll a,ll b){return (a+b)%F;}
ll sub(ll a,ll b){return (a-b+(a-b)/F*F+F)%F;}
int modF(int a,int b){return (a+a/F*F+F)%F;}
void upd(ll &a,ll b){a=(a%F+b%F)%F;}
int n,m;
int a[MAXN];
class Splay
{
public:
int father[MAXN],siz[MAXN],n;
int ch[MAXN][2],val[MAXN];
bool root[MAXN],rev[MAXN];
int addv[MAXN],minv[MAXN]; ll sumv[MAXN];
int roo;
void mem(int _n)
{
MEM(father) MEM(siz) MEM(root) MEM(rev) MEM(ch) MEM(val) flag=0; MEM(addv) MEM(minv)
n=0;
roo=1;
build(roo,1,_n,0);root[1]=1;
}
void newnode(int &x,int f,int v)
{
x=++n;
father[x]=f;
val[x]=minv[x]=sumv[x]=v;siz[x]=1;
}
void build(int &x,int L,int R,int f)
{
if (L>R) return ;
int m=(L+R)>>1;
newnode(x,f,a[m]);
build(ch[x][0],L,m-1,x);
build(ch[x][1],m+1,R,x);
maintain(x);
}
int getkth(int x,int k)
{
pushdown(x);
int t;
if (ch[x][0]) t=siz[ch[x][0]]; else t=0;
if (t==k-1) return x;
else if (t>=k) return getkth(ch[x][0],k);
else return getkth(ch[x][1],k-t-1);
}
void pushdown(int x)
{
}
void maintain(int x)
{
siz[x]=siz[ch[x][0]]+siz[ch[x][1]]+1;
sumv[x]=minv[x]=val[x];
if (ch[x][0]) minv[ x ]=min(minv[x],minv[ ch[x][0] ] + addv[x] ),sumv[x]+=sumv[ch[x][0]];
if (ch[x][1]) minv[ x ]=min(minv[x],minv[ ch[x][1] ] + addv[x] ),sumv[x]+=sumv[ch[x][1]];;
}
void rotate(int x)
{
int y=father[x],kind=ch[y][1]==x;
pushdown(y); pushdown(x);
ch[y][kind]=ch[x][!kind];
if (ch[y][kind]) {
father[ch[y][kind]]=y;
}
father[x]=father[y];
father[y]=x;
ch[x][!kind]=y;
if (root[y])
{
root[x]=1;root[y]=0;roo=x;
}
else
{
ch[father[x]][ ch[father[x]][1]==y ] = x;
}
maintain(y);maintain(x);
}
void splay(int x)
{
while(!root[x])
{
int y=father[x];
int z=father[y];
if (root[y]) rotate(x);
else if ( (ch[y][1]==x)^(ch[z][1]==y) )
{
rotate(x); rotate(x);
}
else
{
rotate(y); rotate(x);
}
}
roo=x;
}
void splay(int x,int r)
{
while(!(father[x]==r))
{
int y=father[x];
int z=father[y];
if (father[y]==r) rotate(x);
else if ( (ch[y][1]==x)^(ch[z][1]==y) )
{
rotate(x); rotate(x);
}
else
{
rotate(y); rotate(x);
}
}
}
void Cut(int a,int b,int c)
{
int x=getkth(roo,a),y=getkth(roo,b);
splay(x);
splay(y,roo);
pushdown(x);pushdown(y);
int z=ch[y][0];
ch[y][0]=0; maintain(y); maintain(x);
int u=getkth(roo,c),v=getkth(roo,c+1);
splay(u);
splay(v,roo);
pushdown(u);pushdown(v);
ch[v][0]=z;father[z]=v;
maintain(v);maintain(u);
}
void Flip(int a,int b)
{
int x=getkth(roo,a),y=getkth(roo,b);
splay(x);
splay(y,roo);
pushdown(x);pushdown(y);
int z=ch[y][0];
rev[z]^=1;
maintain(y); maintain(x);
}
void Add(int a,int b,int c)
{
int x=getkth(roo,a),y=getkth(roo,b);
splay(x);
splay(y,roo);
pushdown(x);pushdown(y);
int z=ch[y][0];
addv[z]+=c; val[z]+=c; minv[z]+=c;
maintain(y); maintain(x);
}
int queryMin(int a,int b)
{
int x=getkth(roo,a),y=getkth(roo,b);
splay(x);
splay(y,roo);
pushdown(x);pushdown(y);
int z=ch[y][0];
maintain(y); maintain(x);
return minv[z];
}
int get_kth(int x) {
splay(x);
int t;
if (ch[x][0]) t=siz[ch[x][0]]; else t=0;
return 1+t;
}
int insert(int a,int P)
{
int x=getkth(roo,a),y=getkth(roo,a+1);
splay(x);
splay(y,roo);
pushdown(x);pushdown(y);
newnode(ch[y][0],y,P);
int temp=n;
maintain(y); maintain(x);
return temp;
}
int insert2(int a,int P)
{
int x=a;
splay(x);
int cc=siz[ch[x][0]]+2;
int y=getkth(roo,cc);
splay(y,roo);
pushdown(x);pushdown(y);
newnode(ch[y][0],y,P);
int temp=n;
maintain(y); maintain(x);
return temp;
}
ll Delete(int a,int b)
{
int x=getkth(roo,a),y=getkth(roo,b);
splay(x);
splay(y,roo);
pushdown(x);pushdown(y);
ll p=sumv[ch[y][0]];
int z=ch[y][0];
ch[y][0]=0; father[z]=0; maintain(y); maintain(x);
return p;
}
ll Delete2(int a,int b)
{
int x=a,y=b;
splay(x);
splay(y,roo);
pushdown(x);pushdown(y);
ll p=sumv[ch[y][0]];
int z=ch[y][0];
ch[y][0]=0; father[z]=0; maintain(y); maintain(x);
return p;
}
bool flag;
void print(int x)
{
if (x==0) return ;
pushdown(x);
print(ch[x][0]);
printf("%d ",val[x]);
print(ch[x][1]);
}
}S;
int main()
{
a[1]=a[2]=1e9;
S.mem(2);
map<int,int> h;
h[0]=S.insert(1,0);
int q;cin>>q;
For(i,q) {
int op;cin>>op;
if(op==1) {
int x;cin>>x;
int id=h[x];
int tmp=S.insert2(id,i);
h[i]=tmp;
}else {
int x,y;cin>>x>>y;
int id1=h[x],id2=h[y];
int k1=S.get_kth(id1),k2=S.get_kth(id2);
if(k1>k2) swap(k1,k2);
cout<<S.Delete(k1,k2)<<endl;
}
}
return 0;
}
G Increase to make it Increasing
```cpp
#include<bits/stdc++.h>
#include<atcoder/all>
using namespace std;
using namespace atcoder;
#define For(i,n) for(int i=1;i<=n;i++)
#define Fork(i,k,n) for(int i=k;i<=n;i++)
#define ForkD(i,k,n) for(int i=n;i>=k;i--)
#define Rep(i,n) for(int i=0;i<n;i++)
#define ForD(i,n) for(int i=n;i;i--)
#define RepD(i,n) for(int i=n;i>=0;i--)
#define Forp(x) for(int p=pre[x];p;p=next[p])
#define Forpiter(x) for(int &p=iter[x];p;p=next[p])
#define Lson (o<<1)
#define Rson ((o<<1)+1)
#define MEM(a) memset(a,0,sizeof(a));
#define MEMI(a) memset(a,0x3f,sizeof(a));
#define MEMi(a) memset(a,128,sizeof(a));
#define MEMx(a,b) memset(a,b,sizeof(a));
#define INF (0x3f3f3f3f)
#define F (1000000007)
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define vi vector<int>
#define pi pair<int,int>
#define SI(a) ((a).size())
#define Pr(kcase,ans) printf("Case #%d: %lld\n",kcase,ans);
#define PRi(a,n) For(i,n-1) cout<<a[i]<<' '; cout<<a[n]<<endl;
#define PRi2D(a,n,m) For(i,n) { \
For(j,m-1) cout<<a[i][j]<<' ';\
cout<<a[i][m]<<endl; \
}
#pragma comment(linker, "/STACK:102400000,102400000")
#define ALL(x) (x).begin(),(x).end()
#define gmax(a,b) a=max(a,b);
#define gmin(a,b) a=min(a,b);
#ifdef DEBUG
#define _GLIBCXX_DEBUG
#endif
#define DEBUG
int recur_depth = 0;
#ifdef DEBUG
#define dbg(x) {++recur_depth; auto x_=x; --recur_depth; cerr<<string(recur_depth, '\t')<<"\e[91m"<<__func__<<":"<<__LINE__<<"\t"<<#x<<" = "<<x_<<"\e[39m"<<endl;}
#else
#define dbg(x)
#endif
template<typename Ostream, typename Cont>
typename enable_if<is_same<Ostream,ostream>::value, Ostream&>::type operator<<(Ostream& os, const Cont& v){
os<<"[";
for(auto& x:v){os<<x<<", ";}
return os<<"]";
}
template<typename Ostream, typename ...Ts>
Ostream& operator<<(Ostream& os, const pair<Ts...>& p){
return os<<"{"<<p.first<<", "<<p.second<<"}";
}
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
ll mul(ll a,ll b){return (a*b)%F;}
ll add(ll a,ll b){return (a+b)%F;}
ll sub(ll a,ll b){return ((a-b)%F+F)%F;}
void upd(ll &a,ll b){a=(a%F+b%F)%F;}
inline int read()
{
int x=0,f=1; char ch=getchar();
while(!isdigit(ch)) {if (ch=='-') f=-1; ch=getchar();}
while(isdigit(ch)) { x=x*10+ch-'0'; ch=getchar();}
return x*f;
}
int main()
{
int n, m;
cin >> n >> m;
vector<int> a(n);
Rep(i,n) cin>>a[i];
ForD(i,n-1) a[i]=a[i]-a[i-1];
mcf_graph<int, long long> g(n + 2);
int s = n, t = n + 1;
ll p=0;
for (int i = 0; i < n; i++) {
if(a[i]<0)
g.add_edge(s, i, -a[i], 0),p+=-a[i];
else g.add_edge(i, t, a[i], 0);
}
dbg(a)
Rep(i,m) {
ll a,b;cin>>a>>b;
a--;
if(b<n)g.add_edge(a,b,INF,1);
else g.add_edge(a,t,INF,1);
}
auto result = g.flow(s, t);
if(result.fi!=p) {
puts("-1");
}
else cout << result.se << endl;
return 0;
}