#include <iostream> #include<algorithm> using namespace std; int main(){ int n; cin>>n; int a[n],b[n]; for(int i=0;i<n;i++){ cin>>a[i]>>b[i]; } for(int i=0;i<n-1;i++){ for(int j=i+1;j<n;j++){ if(a[i]>a[j]){ int t=a[i],tb=b[i]; a[i]=a[j]; a[j]=t; b[i]=b[j]; b[j]=tb; }else if(a[i]==a[j] && b[i]>b[j]){ int t=a[i],tb=b[i]; a[i]=a[j]; a[j]=t; b[i]=b[j]; b[j]=tb; } } } for(int i=0;i<n;i++){ cout<<a[i]<<" "<<b[i]<<endl; } return 0; }