3.1 Occurence Counting

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

int main() {
    int input;
    map<int, int, greater<int>> data;
    while (cin >> input) {
        data[input] += 1;
    }
    cout << "N\tcount" << endl;
    for (pair<int, int> entry : data) {
        cout << entry.first << '\t' << entry.second << endl;
    }
    return 0;
}