题解 | 反序数

#include <iostream>

using namespace std;

int main() {
    int i = 1000;
    while(i * 9 < 10000){
        int x = i;
        int re_i = 0;
        while(x > 0){
            re_i = re_i * 10 + x % 10;
            x = x / 10;
        }
        if(i * 9 == re_i) cout << i << "\n";
        i++;
    }
    return 0;
}