#include <iostream>
#include <stdlib.h>
long long x[150001],y[150001];
using namespace std;

int main(int argc, char *argv[])
{
    long n,f[101],i,j;
    for(i=0;i<=100;i++) f[i]=0;
    cin>>n;
    for(i=0;i<n;i++)
         {cin>>x[i]>>y[i];
         f[y[i]]=1;}
    for(i=100;i>=0;i--)
       if(f[i]==1)
         for(j=0;j<n;j++)
           if(y[j]==i)
             cout<<x[j]<<" "<<y[j]<<endl;
  system("PAUSE");
  return 0;
}

put // before system("PAUSE");