#define _CRT_SECURE_NO_WARNINGS
#include<iostream>
#include<cstdio>
#include<cstdlib>
#include<algorithm>
#include<cmath>
#include<string>
#include<cstring>
#include<vector>


using namespace std;

void swap(int a, int b) {

}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int a[5] = {2, 0, 1, 2, 0};
    int b[5] = {-1, 7, 2, 3, 2};
    int n =  5;

    for(int i=0; i<(n-1); i++)
    {
        for(int j=0; j<(n-i-1); j++)
        {
            int temp = 0;
            if(a[j]>a[j+1])
            {
                temp=a[j];
                a[j]=a[j+1];
                a[j+1]=temp;
                temp=b[j];
                b[j]=b[j+1];
                b[j+1]=temp;
            }
            if(a[j]==a[j+1]) {
                if (b[j] > b[j+1]) {
                temp=a[j];
                a[j]=a[j+1];
                a[j+1]=temp;
                temp=b[j];
                b[j]=b[j+1];
                b[j+1]=temp;
                }
            }
        }
    }


for (int i=0;i<n;i++) {
    cout << a[i] << ' ' << b[i] << endl;
}

    return 0;
}