只过了第3个点。

#include<bits/stdc++.h>
using namespace std;
int x,y;
int tian[]={0,31,28,31,30,31,30,31,31,30,31,30,31};
bool f(int x){
	if(x%400==0||(x%4==0&&x%100!=0)) return 1;
	return 0;
}
long long sum;
int ans;
signed main(){
	cin>>x>>y;
	for(int i=x;i<=y;i++){
		if(f(i)) sum+=1;
		for(int j=1;j<=12;j++){
			if(j!=11) sum+=tian[j];
			else{
				sum+=11;
				if(sum%7==6||sum%7==0) ++ans;
				sum+=19;
			}
		}
	}
	cout<<ans;
	return 0;
}

谢谢