为什么0分？样例没问题，鄙人看不出来

#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,p,b,l,sum=0,ans=0,zyx=0;cin>>n;
	string x,s,xs,xb;
	for (int i=1;i<=n;i++){
		cin>>s>>p>>b>>xs>>xb>>l;
		if (p>=80 && l>=1)sum+=8000;
		if (p>=85 && b>=80)sum+=4000;
		if (p>=90)sum+=2000;
		if (p>=85 && xb=="Y")sum+=1000;
		if (b>=80 && xs=="Y")sum+=850;
		ans+=sum;
		if(zyx<sum){
			zyx=sum;
			x=s;
		}
		sum=0;
	}
	cout<<x<<endl<<zyx<<endl<<ans;
	return 0;
}