#include<iostream>
#include<math.h>
using namespace std;

int main(){
	int n;
	cout<<"请输入打印行数:";
	cin>>n;
	int a[n-1][n-1];
	
	for(int i=0;i<=n-1;i++){
		for(int j=0;j<=i;j++){
			if(j==0){
				a[i][j]=1;
				cout<<a[i][j]<<"\t";
				continue;
			}
			if(j==i){
				a[i][j]=1;
				cout<<a[i][j];
				continue;
			}
			a[i][j]=a[i-1][j-1]+a[i-1][j];
			cout<<a[i][j]<<"\t";
		}
		cout<<"\n";
	}
	return 0;
}