秒 了 直 接

#include<iostream>
#define fastcio ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define INF 0x3f3f3f3f;
#define MAXN (20+5)
using namespace std;
typedef long long ll;
ll YH_tri[MAXN][MAXN];
void ff_assignment(ll FLV_i,ll FLV_j){
    if(FLV_j==1 or FLV_j==FLV_i){
        YH_tri[FLV_i][FLV_j]=1;
    } 
    else{
        YH_tri[FLV_i][FLV_j]=YH_tri[FLV_i-1][FLV_j]+YH_tri[FLV_i-1][FLV_j-1];
    } 
}
int main(void){
    fastcio
    ll n;
    cin>>n;
    for(ll FLV_i=1;FLV_i<=n;FLV_i++){
        for(ll FLV_j=1;FLV_j<=FLV_i;FLV_j++){
            ff_assignment(FLV_i,FLV_j);
        }
    }
    for(ll FLV_i=1;FLV_i<=n;FLV_i++){
        for(ll FLV_j=1;FLV_j<=FLV_i;FLV_j++){
            cout<<YH_tri[FLV_i][FLV_j]<<" ";
        }
        cout<<"\n";
    }
    return 0;
}