#include<bits/stdc++.h> using namespace std; int n,m,a[1000][1000]; int main(){ cin>>n; for(int i=1;i<=n;i++){ for(int j=1;j<=n;j++) cin>>a[i][j]; } for(int i=1;i<=n;i++){ for(int j=1;j<=i;j++){ cout<<a[i][j]<<' '; } cout<<endl; } }
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