感觉输入输出都没问题啊，为啥是0分？

#include <bits/stdc++.h>
using namespace std;
int ans,n,a[10000010],b[1000010];
int main(){
	cin >> n;
	ans++;
	for(int i =n;i >= 1;i--){
		for(int j = 1;j <= n;j++){
			if(ans <10){
				cout << "0" <<ans;
				ans++;
			}
			else{
				cout << ans;
				ans++;
			}
		}
	    cout << endl;
	}    
	cout << endl << endl;
	ans = 1;
    for(int i = 1;i <= n;i++){
    	for(int j = 1;j <= n - i;j++){
    		cout << "  ";
    	}
    	for(int k = 1;k <= i;k++){
    		if(ans < 10){
    			cout << "0" <<ans;
    			ans++;
    		}
    		else{
    			cout <<ans;
    			ans++;
    		}
    	}
    	cout << endl;
    }  
}