UVA-10763 Foreign Exchange
作者:互联网
Vjudge题目链接,STL的map,我上来就set写了一个,wa了才发现每组有重复输入的,所以set不行。
#include<cstdio>
#include<iostream>
#include<map>
#include<algorithm>
using namespace std;
int main(){
int n;
while(~scanf("%d", &n) && n){
map<int, int> mp;
int a1, a2;
for(int i = 0; i < n; i++){scanf("%d %d", &a1, &a2); mp[a1]--; mp[a2]++;}
bool ans = true;
for(map<int,int>::iterator it = mp.begin(); it != mp.end(); it++){
if((it->second) != 0){ans = false; break;}
}
if(ans)printf("YES\n");
else printf("NO\n");
}
return 0;
}
good vegetable
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标签:map,Exchange,int,a1,10763,mp,ans,UVA,include 来源: https://blog.csdn.net/Aldielshala/article/details/104422533