#include<iostream>
using namespace std;
void foo(int a, int b, int c) {
if (a > b)
foo(c, a, b);
else
cout << a << ',' << b << ',' << c << endl;
}
int main(void) {
int a, b, c;
cin >> a >> b >> c;
foo(a, b, c);
return 0;
}
输入: 3 1 2
输出: ______1____
