Hdu 2094 产生冠军 程序参考

#pragma warning(disable : 4786)#include <iostream>#include <string>#include <set>using namespace std;bool run(){int n;cin>>n;if (n==0) return false;string s,t;set <string> all,lose;for(int i=0;i<n;i++){cin>>s>>t;all.insert(s);all.insert(t);lose.insert(t);}if (all.size()-lose.size()==1) cout<<"Yes/n";elsecout<<"No/n";return true;}