谁帮我看看

第十个WA了

#include<bits/stdc++.h>
using namespace std;
int summer(int x){
    int ans = 0;
    string num = to_string(x);
    int l = num.size();
    for(int i = 0;i < l;i++) ans += num[i] - '0';
    return ans;
}
int main(){
    int m,n; cin >> m >> n;
    if(m == 1 && n == 0){
        cout << "0 0";
        return 0;
    }
    int down = pow(10,m - 1),up = pow(10,m) - 1;
    bool flag = 0;
    for(int i = down;i <= up;i++){
        if(summer(i) == n){
            cout << i << " ";
            flag = 1;
            break;
        }
    }
    if(flag == 0) cout << "-1 -1";
    else{
        for(int i = up;i >= down;i--){
            if(summer(i) == n){
                cout << i;
                break;
            }
        }
    }
    return 0;
}