easy

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int main() {
int n;
cin >> n;
int triangle[n + 1][n + 1];
for (int i = 1; i <= n; i++) {
triangle[i][1] = 1;
triangle[i][i] = 1;
}
for (int i = 3; i <= n; i++) {
for (int j = 2; j < i; j++) {
triangle[i][j] = triangle[i - 1][j] + triangle[i - 1][j - 1];
}
}
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= i; j++) {
cout << triangle[i][j] << " ";
}
cout << endl;
}
return 0;
}