#include <iostream>
#include <map>
#include <string>

using namespace std;

int main() {
    int n;
    cin >> n;
    map<string, int> students;

    for(int i = 0; i < n; i++) {
        string name;
        int age;
        cin >> name >> age;
        students[name] = age; 
    }

    for(const auto&student : students) {
        cout << student.first << " " << student.second << endl;
    }

    return 0;
}