#include<iostream> using namespace std; int main(){ int y,o=1,er=1; cin>>y; int youku[y+1][y+1]; for(int E=1;E<=y;E++){ if(er){ for(int r=1;r<=y;r++){ youku[E][r]=o++; } er=0; }else{ for(int r=y;r>=1;r--){ youku[E][r]=o++; } er=1; } } for(int t=1;t<=y;t++){ for(int u=1;u<=y;u++){ cout<<youku[t][u]<<" "; } cout<<endl; } return 0; }