自测没问题，洛谷上CE，求调，回复必关

#include<bits/stdc++.h>
using namespace std;
int year;
int start,end;
int ans;
int main()
{
	cin>>start>>end;
	start++,end++;
	for(year=start;year<=end;year++)
	{
		if(year%100!=0)if(year%4==0)ans+=year;
		else if(year%400==0)ans+=year;
	}
	cout<<ans;
	return 0; 
}