算法讲解:
https://blog.youkuaiyun.com/hzj1054689699/article/details/51866615
https://zhuanlan.zhihu.com/p/25017840
#include<bits/stdc++.h>
#define fi first
#define se second
#define FOR(a) for(int i=0;i<a;i++)
#define sc(a) scanf("%d",&a)
#define show(a) cout<<"Here is "<<a<<endl;
#define show2(a,b) cout<<"Here is "<<a<<" "<<b<<endl;
#define show3(a,b,c) cout<<"Here is "<<a<<" "<<b<<" "<<c<<endl;
using namespace std;
typedef long long ll;
typedef pair<int, int> P;
typedef pair<P, int> LP;
const ll inf = 1e17 + 10;
const int N = 1e6 + 10;
const ll mod = 10007;
const int base=131;
ll n,block,m,id,k,t[N];
ll bl[N],a[N],num[10000000];
ll up[N],dw[N],ans;
ll res[N];
//unordered_map<int,int> mp;
struct node
{
int l,r,id;
}q[N];
bool cmp(node a,node b)
{
if(bl[a.l]==bl[b.l]) return a.r<b.r;
return bl[a.l]<bl[b.l];
}
void add(int x)
{
}
void del(int x)
{
}
int main()
{
ios::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
cin>>n>>k;
block=sqrt(n);
for(int i=1;i<=n;i++)
{
cin>>t[i];
bl[i]=(i-1)/block+1;
}
for(int i=1;i<=n;i++)
cin>>a[i];
cin>>m;
for(int i=1;i<=m;i++)
{
cin>>q[i].l>>q[i].r;
q[i].id=i;
}
sort(q+1,q+m+1,cmp);
int L=1,R=0;
for(int i=1;i<=m;i++)
{
int id=q[i].id;
while(R<q[i].r) R++,add(R);
while(L>q[i].l) L--,add(L);
while(R>q[i].r) del(R),R--;
while(L<q[i].l) del(L),L++;
res[id]=ans;
}
for(int i=1;i<=m;i++)
{
cout<<res[i]<<" ";
}
}
题目
已完成:
小Z的袜子
XOR and Favorite Number
http://www.codeforces.com/contest/617/problem/E
http://codeforces.com/contest/86/problem/D
未完成:
D-query
https://vjudge.net/problem/SPOJ-DQUERY
Little Elephant and Array
https://vjudge.net/problem/CodeForces-220B
http://www.codeforces.com/contest/620/problem/F
http://www.codeforces.com/contest/633/problem/H