2014 UESTC Training for Graph Theory Problem F 握手
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先是WA
然后TLE
然后MLE
最后终于AC了。
出现 3 100 1 1 我没判断就WA了。
然后用数组sort 发现对于这种 100000的数据,sort 肯定跪。
就用了优先队列,一不小心把 临时的queue 写在自定义函数中就 MLE了。
改到最后终于AC了。。。。
#include<cstdio>#include<cstring>#include<cmath>#include<queue>#include<vector>#include<algorithm>#include<iostream>using namespace std;priority_queue <int> que;queue<int>q;bool build(){ int tmp=que.top();que.pop(); if(tmp==0)return 1; for(int i=0;i<tmp;i++) { if(que.empty())return 0; int t=que.top();que.pop(); if(t<=0)return 0; t--;q.push(t); } for(int i=0;i<tmp;i++) { int t=q.front();q.pop(); que.push(t); } return build();}int main(){ int t; scanf("%d",&t); while(t--) { int n; while(!que.empty())que.pop(); while(!q.empty())q.pop(); scanf("%d",&n); for(int i=0;i<n;i++) { int tmp; scanf("%d",&tmp); que.push(tmp); } if(build())puts("YES"); else puts("NO"); }}
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