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OI-codes/Luogu/P1008/P1008.cpp

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#include <bits/stdc++.h>
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;
}