#include <iostream>
#include<cstdio>
#include<algorithm>

using namespace std;

struct excel{
    int number;
    int score;
};    
excel stu[1000];

int Compare(excel a,excel b){
    if(a.score==b.score)
        return a.number<b.number;
    else return a.score<b.score;
}

int main() {
    int n;
    while(scanf("%d",&n)!=EOF){
        for(int i=0;i<n;i++)
            scanf("%d%d",&stu[i].number,&stu[i].score);
        sort(stu,stu+n,Compare);
        for(int i=0;i<n;i++)
            printf("%d %d\n",stu[i].number,stu[i].score);
    }
    return 0;
    }

// 64 位输出请用 printf("%lld")