题解 | #反序数#
反序数
https://www.nowcoder.com/practice/e0d06e79efa44785be5b2ec6e66ba898
像我这种脑子只会暴力求解，QAQ
#include<iostream>
#include<cstdio>
using namespace std;
int main(){
int a, b, c, d;
for(a = 1; a <= 9; a++){
for(b = 0; b <= 9; b++){
for(c = 0; c <= 9; c++){
for(d = 0; d <= 9; d++){
if((a * 1000 + b * 100 + c * 10 + d) * 9 == d * 1000 + c * 100 + b * 10 + a){
printf("%d%d%d%d\n",a,b,c,d);
}
}
}
}
}
return 0;
}