P5742 #1 WA #2 WA #3 WA #4 WA #5 WA WA Code:

#include <iostream>
#include <cstdio>
#include <string>
#include <istream>
#include <cstdlib>
#include <iomanip>
#include <string_view>
#include <cstring>
#include <random>
#include <bits/basic_string.h>
#include <ext/atomicity.h>
#include <initializer_list>
#include <ext/alloc_traits.h>
#include <vector>
#include <regex>
#include <list>
#include <stack>
#include <ratio>
#include <map>
#include <ios>
#include <ctime>
#include <cmath>
#include <fstream>
#include <cctype>
#include <algorithm>
using namespace std;
#define PI 3.1416
#define eps 1e-5
typedef unsigned long long ULL;
typedef long long LL;
typedef unsigned int U;
typedef unsigned short UST;
typedef unsigned char UC;

struct student
{
    int id, study, extend, allabove;
    int sum()
    {
        return study + extend;
    }
};

int ge_wei(ULL x)
{
    return x % 10;
}

int sh_wei(ULL x)
{
    return x % 100 - ge_wei(x);
}

int bai_wei(ULL x)
{
    return x % 1000 - sh_wei(x) - ge_wei(x);
}

bool is_excellent(student stu)
{
    return (stu.allabove >= 800 ? true : false);
}

int main(int argc, char** argv)
{
    ios::sync_with_stdio(false);
    cin.sync_with_stdio(false);
    cout.sync_with_stdio(false);
    int n;
    cin >> n;
    vector<student> a(n);
    for(int i = 0; i < n; i++)
    {
        cin >> a[i].id >> a[i].study >> a[i].extend;
        a[i].allabove = a[i].study * 7 + a[i].extend * 3;
    }
    for(int i = 0; i < n; i++)
    {
        if(is_excellent(a[i]))
        {
            cout << "Excellent" << (i + 1 == n ? '\0': '\n');
        }
        else
        {
            cout << "Not excellent" << (i + 1 == n ? '\0': '\n');
        }
    }
    return 0;
}

Who can help me?