答案

#include<iostream>
#include<string>
#include<algorithm>
using namespace std;

int a;
bool isSelf(string x){
    string y = to_string(a);
    string z = x.substr(x.length() - y.length());
    if(z == y) return true;
    return false;
}
int main(){
    int M;
    cin >> M;
    while(M--){
        cin >> a;
        int flag = 1;
        for(int i = 1 ; i < 10 ; i ++){
            if(isSelf(to_string(i*a*a))){
                cout << i << " " << i * a * a << endl;
                flag = 0;
                break;
            }
        }
        if(flag) cout << "No" << endl;
    }
}