#include <iostream>
#include <algorithm>

using namespace std;

int N = 110;

typedef struct student{
    int num;
    int score;
}s;

bool cmp(s l, s r){
    if(l.score < r.score)   return true;
    else if(l.score == r.score && l.num < r.num) return true;
    else return false;
}

int main(){
    int n;
    cin >> n;
    s arr[N];
    for(int i = 0; i < n; ++ i)
        cin >> arr[i].num >> arr[i].score;

    sort(arr, arr + n, cmp);

    for(int i = 0; i < n; ++ i)
        cout << arr[i].num << " " << arr[i].score << endl;

    return 0;
}