90分求解

#include <bits/stdc++.h>
#define ll long long
#define endl "\n"
using namespace std;
int main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    int a, b, c, d;
    cin >> a >> b >> c >> d;
    if (a == b || a == c || b == c){
        cout << "Report" << endl;
        return 0;
    }
    if (a == d){
        cout << "A" << endl;
    }else if (b == d){
        cout << "B" << endl;
    }else if (c == d){
        cout << "C" << endl;
    }else{
        if (a == min(max(a,b),c)){
            cout << "A" << endl;
        }else if (b == min(max(a,b),c)){
            cout << "B" << endl;
        }else{
            cout << "C" << endl;
        }
    }
    return 0;
}