int main()
{
int n, i, j;
scanf("%d", &n);
int arr[n][n]; //变长数组,C99
for(i = 0; i < n; i++)
{
for(j = 0; j <= i; j++)
{
if(j == 0|| j == i)
{
arr[i][j] = 1;
}
else
{
arr[i][j] = arr[i - 1][j - 1] + arr[i - 1][j];
}
printf("%5d", arr[i][j]);
}
printf("\n");
}
return 0;
}