$ Please make sure that you have tried enough and than see solution for gathering concept.


$ Code:-

#include<iostream>
#include<algorithm>
using namespace std;

int main()
{
    int a[3];
    cin >> a[0] >> a[1] >> a[2];
    sort(a, a+3);
    cout << min((a[0]-a[1]-a[2]), (a[0]-a[1]*a[2])) << endl;
}

It IS already sorted. XD