从零开始

#include<iostream>using namespace std;int main(){int m,x,y;int i;cin>>m;while(m!=0){for(i=0;i<m;i++){cin>>x>>y;cout<<x+y;}cin>>m;}return 0;}

#include<iostream>using namespace std;int main(){int m;cin>>m;while(m!=0){if((m%4==0&&m%100!=0)||m%400==0)cout<<"YES"<<endl;elsecout<<"NO"<<endl;cin>>m;}return 0;}