【題目敘述】https://zerojudge.tw/ShowProblem?problemid=d183 (考生答對率: 11.99%)
【解題想法】枚舉除數
#include <iostream>
#include <cmath>
using namespace std;
int main(){
int n;
while (cin >> n){
if (n == 0){
break;
}
bool f = false;
for (int b = 1234; b <= 98765 / n; b++){
int a = b * n;
int c = a, d = b;
int count = (d < 10000);
while (d){
count |= 1 << (d % 10);
d /= 10;
}
while (c){
count |= 1 << (c % 10);
c /= 10;
}
if (count == (1 << 10)-1){
cout << a << " / ";
if (b < 10000) cout << "0";
cout << b << " = " << n << "\n";
f = true;
}
}
if (!f){
cout << "There are no solutions for " << n << ".\n";
}
cout << "\n";
}
}