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转载 Codeforces_846

A.简单dp。#include<bits/stdc++.h>using namespace std;int n,a[105],dp[105][2] = {0};int main(){ ios::sync_with_stdio(0); cin >> n; for(int i = 1;i <= n...

2017-09-06 19:33:00 266

转载 Codeforces_851

A.分三种情况。#include<bits/stdc++.h>using namespace std;int n,k,t;int main(){ ios::sync_with_stdio(0); cin >> n >> k >> t; if(t <= k) cout ...

2017-09-05 20:53:00 236

转载 iomanip、cstring、string、sstream

#include<iomanip> 控制符作用dec设置整数为十进制hex设置整数为十六进制oct设置整数为八进制...

2017-09-03 01:57:00 176

转载数学结论、计算几何

排列组合圆排列有限多重集的排列 n！/(n1!*n2!*...*nk!)n元无限集可重-r组合C(n+r-1,r)种。n元无限集取r个,n中每个至少出现一次C(r-1,n-1)(r≥n)直线分平面：f(1) = 2f(n) = f(n-1)+n = n(n+1)/2+1折线分平面：f(1) = 2f(n) = f(n-1)+4(n-1)...

2017-09-03 01:57:00 245

转载字符串

//普通void getnext1(char *s){ int i = 0,j = -1,len = strlen(s); ne[0] = -1; while(i < len) { if(j == -1 || s[i] == s[j]) ne[++i] = ++j; else j ...

2017-09-02 22:38:00 85

转载图论

最短路：//权值非负，不连通为INF、//O(n^2)void dij(int beg){ memset(dis,0x3f,sizeof(dis)); memset(vis,0,sizeof(vis)); dis[beg] = 0; for(int i = 1;i <= n;i++) { i...

2017-09-02 22:38:00 143

转载数据结构

void init(){ for(int i = 1;i <= n;i++) pre[i] = i;} int findd(int x) 递归 { return pre[x] == x?x:pre[x] = findd(pre[x]);}void join(int a,int b){ ...

2017-09-02 22:38:00 242

转载动态规划

int dp[1005][1005] = {0},len1,len2;char a[1005],b[1005];void lcs(){ for(int i = 1; i <= len1;i++) { for(int j = 1;j <= len2;j++) { if(...

2017-09-02 22:37:00 81

转载数论

int cnt,prime[MAXN+1],mi[MAXN+1],vis[MAXN+1];//cnt表示素数个数//prime存放每个素数//mi存放每个数的最小素数因子void getprime(){ cnt = 0; memset(prime,0,sizeof(prime)); for(int i = 2;i <...

2017-09-02 22:37:00 136

转载头文件、输入挂、随机数

#pragma comment(linker, "/STACK:102400000,102400000")#include<cstdio>#include<iostream>#include<iomanip>#include<algorithm>#include<cmath>#include&...

2017-09-02 01:56:00 115

转载 Codeforces_849

A.只要考虑分成一个串的情况就可以了。#include<bits/stdc++.h>using namespace std;int n,a[105];int main(){ ios::sync_with_stdio(0); cin >> n; for(int i = 1;i <= n;i++)...

2017-09-02 01:32:00 137

转载 Codeforces_842

A.枚举一个区间，判断是否有数符合。#include<bits/stdc++.h>using namespace std;long long l,r,x,y,k;int main(){ ios::sync_with_stdio(0); cin >> l >> r >> x >&g...

2017-08-30 03:37:00 89

转载 Codeforces_844

A.统计字母个数。#include<bits/stdc++.h>using namespace std;string s;int n;map<char,int> mp;int main(){ ios::sync_with_stdio(0); cin >> s >> n; ...

2017-08-26 21:24:00 127

转载 Codeforces_845

A.排序，比较中间两个大小。#include<bits/stdc++.h>using namespace std;int n,a[205];int main(){ ios::sync_with_stdio(0); cin >> n; for(int i = 1;i <= 2*n;i++) ci...

2017-08-26 19:34:00 119

转载 Codeforces_101498

A.map统计数量，更新最大值。#include<bits/stdc++.h>using namespace std;int n;map<int,int> mp;int main(){ ios::sync_with_stdio(0); int T; cin >> T; wh...

2017-08-26 18:33:00 160

转载 Codeforces_841

A.统计每个字母数量，比较是否超过k。#include<bits/stdc++.h>using namespace std;int n,k,cnt[26] = {0};string s;int main(){ ios::sync_with_stdio(0); cin >> n >> k &gt...

2017-08-19 09:12:00 237

转载 Codeforces_839

A.每天更新判断。#include<bits/stdc++.h>using namespace std;int n,k,a[105];int main(){ ios::sync_with_stdio(0); cin >> n >> k; for(int i = 1;i <= n;i...

2017-08-18 22:25:00 118

转载 Codeforces_837

A.扫一遍。#include<bits/stdc++.h>using namespace std;int n;string s;int main(){ cin >> n; getchar(); getline(cin,s); int ans = 0,maxx = 0; for...

2017-08-18 10:00:00 117

转载 Codeforces_834

A.两个方向都判断。#include<bits/stdc++.h>using namespace std;string s1,s2;map<char,int> mp;int n;int main(){ ios::sync_with_stdio(0); mp['v'] = 0; mp['&lt...

2017-08-01 18:35:00 156

转载 Codeforces_835

A.比较两人总时间。#include<bits/stdc++.h>using namespace std;int s,v1,v2,t1,t2;int main(){ ios::sync_with_stdio(false); cin >> s >> v1 >> v2 >> t...

2017-08-01 14:21:00 82

转载 Codeforces_813

A.统计总时间，从总时间开始找第一个能提交的点。#include<bits/stdc++.h>using namespace std;int n,m,a[1005],ok[100005] = {0};int main(){ ios::sync_with_stdio(0); cin >> n; int...

2017-07-29 01:01:00 93

转载 Codeforces_814

A.b序列从大到小填a序列中的0，在判断。#include<bits/stdc++.h>using namespace std;int n,m,a[105],b[105];int main(){ ios::sync_with_stdio(0); cin >> n >> m; for(in...

2017-07-29 00:10:00 110

转载 Codeforces_817

A.要求坐标差为移动距离的两倍。#include<bits/stdc++.h>using namespace std;int main(){ ios::sync_with_stdio(0); int x1,x2,y1,y2,x,y; cin >> x1 >> y1 >> x2 &gt...

2017-07-27 23:48:00 87

转载 Codeforces_816

A.不断增加时间，直到符合要求。#include<bits/stdc++.h>using namespace std;int a,b;char c;int f(int x){ return x%10*10+x/10;}int main(){ ios::sync_with_stdio(0); ...

2017-07-27 14:42:00 145

转载 Codeforces_821

A.直接判断每一个数。#include<bits/stdc++.h>using namespace std;int n,a[55][55];int main(){ ios::sync_with_stdio(0); cin >> n; for(int i = 1;i <= n;i++) ...

2017-07-27 00:17:00 184

转载 Codeforces_832

A.判断n/k的奇偶性。#include<bits/stdc++.h>using namespace std;long long n,k;int main(){ ios::sync_with_stdio(0); cin >> n >> k; long long t = n/k; ...

2017-07-25 11:54:00 175

转载 Codeforces_820

A.直接模拟。#include<bits/stdc++.h>using namespace std;int c,v0,v1,a,l;int main(){ ios::sync_with_stdio(0); cin >> c >> v0 >> v1 >> a >>...

2017-07-24 22:29:00 87

转载 Codeforces_818

A.winners总数为（k+1）diplomas。#include<bits/stdc++.h>using namespace std;long long n,k;int main(){ ios::sync_with_stdio(0); cin >> n >> k; long long...

2017-07-24 12:28:00 141

转载 Codeforces_822

A.小的那个数的阶乘。#include<bits/stdc++.h>using namespace std;int a,b;int main(){ ios::sync_with_stdio(0); cin >> a >> b; int t = min(a,b); int an...

2017-07-24 00:09:00 100

转载 Codeforces_828

A.模拟，注意单人的时候判断顺序。#include<bits/stdc++.h>using namespace std;int n,a,b;int main(){ ios::sync_with_stdio(0); cin >> n >> a >> b; int b1 = b,...

2017-07-23 23:46:00 172

转载 Codeforces_831

A.线性判断。#include<bits/stdc++.h>using namespace std;int n,a[105] = {0};int main(){ ios::sync_with_stdio(0); cin >> n; for(int i = 1;i <= n;i++) cin...

2017-07-23 14:27:00 126

转载 Codeforces_825

A.连续1的个数，0用来分割，注意连续的0。#include<bits/stdc++.h>using namespace std;int n;string s;int main(){ ios::sync_with_stdio(0); cin >> n >> s; int now = ...

2017-07-19 11:40:00 134

转载 Codeforces_812

A. 每条人行道有六条车道会撞到。#include<bits/stdc++.h>using namespace std;int a[4],b[4],c[4],d[4];int main(){ ios::sync_with_stdio(0); for(int i = 0;i < 4;i++) cin >&...

2017-06-03 00:33:00 97

转载 Codeforces_794

A.统计两个guard之间的钞票数。#include<bits/stdc++.h>#define MOD 1000000009using namespace std;int a,b,c,n;int main(){ ios::sync_with_stdio(false); cin >> a >>...

2017-05-14 02:42:00 138

转载 Codeforces_799

A.求两个时间比较一下。#include<bits/stdc++.h>using namespace std;int n,t,k,d;int main(){ ios::sync_with_stdio(false); cin >> n >> t >> k >> d; ...

2017-05-13 02:35:00 48

转载 Codeforces_807

A. 严格按照题目给的两个条件来。#include<bits/stdc++.h>using namespace std;int n,a[1005],b[1005];int main(){ ios::sync_with_stdio(false); cin >> n; for(int i = 1;i &...

2017-05-08 15:57:00 112

转载 Codeforces_805

A.当l == r时，肯定输出这个数就可以了，当存在两个或两个以上连续的数时，2肯定是最多的数，或最多的数之一。#include<bits/stdc++.h>using namespace std;int l,r;int main(){ ios::sync_with_stdio(false); cin >> ...

2017-05-05 23:18:00 105

转载 2017西电第一次省赛选拔赛补题

https://vjudge.net/contest/161101#overviewA.判断B是否能整除A的每一个素因子。#include<bits/stdc++.h>using namespace std;int prime[1000005],vis[1000005] = {0};long long a,b;int main()...

2017-05-05 01:05:00 123

转载 Codeforces_793

A.找最小的数，看每个数跟它的差是否被k整除。#include<bits/stdc++.h>#define MOD 1000000007using namespace std;int n,cnt[100005] = {0},ans[100005],two[100005];int main(){ ios::sync_with_s...

2017-05-02 06:28:00 155

转载 Codeforces_803

A. 填k个1，使矩阵主对角线对称，相同情况选择上面1数量多的。#include<bits/stdc++.h>using namespace std;int n,k,a[105][105] = {0};int main(){ ios::sync_with_stdio(false); cin >> n >...

2017-05-02 05:06:00 54

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