#include <iostream>
#include <vector>
#include <map>
using namespace std;

int main()
{
    // 1 = freshman
    // 2 = sophomores
    // 3 = juniors
    // 4 = seniors
    int cls = 0, cont = 0;
    vector< int > totalContribution(5, 0);
    map< int, string > m;
    m[1] = "freshman";
    m[2] = "sophomores";
    m[3] = "juniors";
    m[4] = "seniors";

    while(1) {
        cout << "Enter class: ";
        cin >> cls;
        if(cls < 1 || cls > 4) {
            cout << "You have entered wrong class\n";
            break;
        }
        cout << "Enter contributed amount: ";
        cin >> cont;
        totalContribution[cls] += cont;
    }
    int mx = 0;
    for(int i=1; i<=4; i++) {
        mx = max(mx, totalContribution[i]);
        cout << "Total contribution of class " << i << "(" << m[i] << ")" << ": " << totalContribution[i] << "\n";
    }
    cout << "Class(es) that contributed the most: ";
    for(int i=1; i<=4; i++) {
        if(mx==totalContribution[i]) cout << i << " ";
    }
    cout << "\n";

    return 0;
}