#include <iostream>

using namespace std;

int main(){

int  n, m, i, j = 1;

cin >> n; //輸入層數

for(m = 1; m < n+1; m++){

for(i = 1; i <= n; i++){

if (j <= (n - m + 1) - i){ //輸出底線

cout << "_";

j++;

}

else if(j <= i){ //輸出星號

cout << "*";

}

j=1; //重製j

}

cout << "\n"; //換行

}

return 0;

}