直接cout！

#include <bits/stdc++.h>
using namespace std;
int main() {
    int a, b, c;
    cin >> a >> b >> c;
    cout << min(min(a, b), c) << ' ' << a + b + c - min(min(a, b), c) - max(max(a, b), c) << ' ' << max(max(a, b), c) << '\n';
    return 0;
}