[NOIP 1998 普及组 T1] 三连击
#include <bits/stdc++.h>
using namespace std;
int x[10]; //放1-9的桶
int main()
{
for (int i = 123; i <= 345; i++)
{
int a = i;
int b = i * 2;
int c = i * 3;
memset(x, 0, sizeof(x));
while (a)
{
x[a % 10]++;
a /= 10;
}
while (b)
{
x[b % 10]++;
b /= 10;
}
while (c)
{
x[c % 10]++;
c /= 10;
}
bool flag = true;
for (int j = 1; j < 10; j++)
if (x[j] != 1)
{
flag = false;
break;
}
if (flag)
{
cout << i << ' ' << 2 * i << ' ' << 3 * i << endl;
}
}
return 0;
}