标签:证明 std mat cst stack read space queue getch
如果有方案,那么肯定可以用两道题目完成
这是证明
#include<cstdio>
#include<cstring>
#include<algorithm>
#include<iostream>
#include<cmath>
#include<stack>
#include<queue>
using namespace std;
typedef long long ll;
const int maxn = 100010;
int n,k;
int a[20];
ll read(){ ll s=0,f=1; char ch=getchar(); while(ch<‘0‘ || ch>‘9‘){ if(ch==‘-‘) f=-1; ch=getchar(); } while(ch>=‘0‘ && ch<=‘9‘){ s=s*10+ch-‘0‘; ch=getchar(); } return s*f; }
int main(){
memset(a,0,sizeof(a));
n = read(), k = read();
for(int i=1;i<=n;++i){
int res = 0;
for(int j=1;j<=k;++j){
int p = read();
res += (p<<(k-j));
}
++a[res];
}
int flag = 0;
for(int i=0;i<(1<<k);++i){
for(int j=0;j<(1<<k);++j){
if(a[i] > 0 && a[j] > 0 && ((i&j)==0) ){
flag = 1;
printf("YES\n");
break;
}
}
if(flag) break;
}
if(!flag){
printf("NO\n");
}
return 0;
}
codeforces 868C - Qualification Rounds (思维)
标签:证明 std mat cst stack read space queue getch
原文地址:https://www.cnblogs.com/tuchen/p/13833162.html