my map

#include<cstring>
#include <iostream>
#include <map>
using namespace std;
int main() {
    std::map<string, int> mp;
    int d = 0;
    string name;
    string a, b, c;
    while (cin) {
        cin >> a >> b >> c;
        name = a + " " + b + " " + c;
        cin >> d;
        mp[name, d] += d;
        if (!cin)
            break;
    }
    for (auto i = mp.begin(); i != mp.end(); ++i) {
        cout << i -> first << " " << i -> second << endl;
    }
}