Problem:
Score : 300 points

Problem Statement

You are given three integers A, B and C. Find the minimum number of operations required to make A, B and C all equal by repeatedly performing the following two kinds of operations in any order:

Choose two among A, B and C, then increase both by 1.

Choose one among A, B and C, then increase it by 2.

It can be proved that we can always make A, B and C all equal by repeatedly performing these operations.

Constraints

0 \leq A,B,C \leq 50

All values in input are integers.

Input

Input is given from Standard Input in the following format:

A B C

Output

Print the minimum number of operations required to make A, B and C all equal.

Sample Input 1

2 5 4

Sample Output 1

2

We can make A, B and C all equal by the following operations:

Increase A and C by 1. Now, A, B, C are 3, 5, 5, respectively.

Increase A by 2. Now, A, B, C are 5, 5, 5, respectively.

Sample Input 2

2 6 3

Sample Output 2

5

Sample Input 3

31 41 5

Sample Output 3

23

Solution in C++14 (GCC 5.4.1) (judge verdict: Wrong Answer)

#include<bits/stdc++.h>
using namespace std;
int main(){
    int A=0,B=0,C=0;
    int max,mid,min;
    int po,ro;
    int ho=0;
    int kiflag=0,kuflag=0;
    int ans=0;


    cin>>A>>B>>C;
    
    if(A>B&&B>C){
        max=A;
        mid=B;
        min=C;
    }else if(A>C&&B<C){
        max=A;
        mid=C;
        min=B;
    }else if(B>A&&A>C){
        max=B;
        mid=A;
        min=C;
    }else if(B>C&&A<C){
        max=B;
        mid=C;
        min=A;
    }else if(C>A&&A>B){
        max=C;
        mid=A;
        min=B;
    }else if(C>B&&B>A){
        max=C;
        mid=B;
        min=A;
    }
    po=max-mid;
    ro=max-min;


    if(po%2==1&&ro%2==1){
        ro--;
        po--;
        kiflag=1;
    }
    cout<<po<<"  "<<ro<<endl;

    ho=abs(ro-po);
    if(ho%2==1){
        kuflag+=2;
        if(po%2==1){
            po--;
        }
        if(ro%2==1){
            ro--;
        }
    }
    cout<<po<<"  "<<ro<<endl;


    ans=kuflag+kiflag+po/2+ro/2;

    cout<<ans<<endl;

}