P1051代码快和题解一样了，但还是错误的

#include <iostream>
#include <cstring>
using namespace std;
int main()
{
    int n,sum = 0,maxn = 0,mo = 0,ban = 0,lun = 0,ans = 0; //sum 个人得分，maxn最高个人得分，mo期末平均成绩，ban班级评议成绩，lun发表的论文数，ans这 N 个学生获得的奖学金的总数
    string name,won;//name姓名，won获得最多奖金的学生的姓名
    char xue,xi;//xue是否是学生干部，xi是否是西部省份学生
    cin >> n;
    for (int i = 1;i <= n;i++)
    {
        cin >> name >> mo >> ban >> xue >> xi >> lun;
        if (lun >= 1 && mo > 80)
            sum += 8000;
        if (ban > 80 && mo > 85)
            sum += 4000;
        if (mo > 90)
            sum += 2000;
        if (int(xi) == 121 && mo > 85)//‘Y’的ASCII是121
            sum += 1000;
        if (int(xue) == 121 && ban > 80)
            sum += 850;
        ans += sum;
        if (sum > maxn) 
        {
            maxn = sum;
            won = name;
        }
        sum = 0;
    }
    cout << won << endl << maxn << endl << ans;
    return 0;
}