#include <iostream>
#include<string>
using namespace std;
int main() {
int i;
int DIM1;
int DIM2;
cin >> DIM1;
DIM2 = DIM1;
int ary[DIM1][DIM2];
DIM1 = 1;
for (int i = 0; i < DIM1; i++) {
for (int j = 0; j < i; j++) {
ary[i][j] = i;
cout << " " << ary[i][j];
}
if(DIM1==DIM2){
break;
}
DIM1++;
}
return 0;
}
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