#include <iostream>
using namespace std;
int main() {
// your code goes here
int n=5,i,j;
for(i=1;i<=n;i++){
for(j=1;j<=2*n-1;j++){
if(i>=n-j) cout<<j;
else cout<<" ";
}
cout<<"\n";
}
return 0;
}
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