题解 | A467.判断n位数

#include <bits/stdc++.h>
using namespace std;
int main() {
    int x , n;
    cin >> x >> n;
    if(n == 1){
        if(x >= 0 && x <= 9){
            cout << "Yes";
        }
        else{
            cout << "No";
        }
    }
    if(n == 2){
        if(x >= 10 && x <= 99){
            cout << "Yes";
        }
        else{
            cout << "No";
        }
    }
    if(n == 3){
        if(x >= 100 && x <= 999){
            cout << "Yes";
        }
        else{
            cout << "No";
        }
    }
    if(n == 4){
        if(x >= 1000 && x <= 9999){
            cout << "Yes";
        }
        else{
            cout << "No";
        }
    }
    return 0;
}