#include using namespace std; int a, b, c, f[] = {1, 2, 3, 4, 5, 6, 7, 8, 9}; int main() { do { a = f[0] * 100 + f[1] * 10 + f[2]; b = f[3] * 100 + f[4] * 10 + f[5]; c = f[6] * 100 + f[7] * 10 + f[8]; if (a * 3 == c && b * 3 == c * 2) { cout << a << ' ' << b << ' ' << c << endl; } } while (next_permutation(f, f + 9)); return 0; }