#include using namespace std; int main(){ int n,c; cin>>n; int a=2*n-1; for(int i=1;i<=a;i=i+2){ for(int ii=(a-i)/2;ii>0;ii--){ cout<<" "; } for(int iii=1;iii<=i;iii++){ cout<<iii; } cout<<endl; } for(int i=a-2;i>0;i=i-2){ for(int ii=(a-i)/2;ii>0;ii--){ cout<<" "; } for(int iii=1;iii<=i;iii++){ cout<<iii; } cout<<endl; } return 0; }
