Программа, определяющая сумму, за которую сотрудники смогут продать весь песок в случае наилучшего заполнения емкостей песком

#include <windows.h>
#include <fstream>
 
using namespace std;
 
ifstream in;
 
void Calculation(int One, int Two, int Three, int &Max, int &Min, int &Sred)
{
    if( (One > Two) && (One > Three) ) Max = One;
    else if( (Two > One) && (Two > Three) ) Max = Two;
    else Max = Three;
 
    if( (One < Two) && (One < Three) ) Min = One;
    else if( (Two < One) && (Two < Three) ) Min = Two;
    else Min = Three;
 
    if( (One > Two) && (One != Max) ) Sred = One;
    else if( (One > Three) && (One != Max) ) Sred = One;
    else if( (Two > One) && (Two != Max) ) Sred = Two;
    else if( (Two > Three) && (Two != Max) ) Sred = Two;
    else if( (Three > One) && (Three != Max) ) Sred = Three;
    else Sred = Three;
}
 
int main()
{
    in.open("input.txt");
 
    if( !in.is_open() )  { printf("Input error \n"); system("pause"); return 0; }
 
    int A1, A2, A3 = NULL;
    int B1, B2, B3 = NULL;
 
    in >> A1;
    in >> A2;
    in >> A3;
 
    in >> B1;
    in >> B2;
    in >> B3;
 
    int MaxCost = NULL;
    int SredCost = NULL;
    int MinCost = NULL;
 
    int MaxWeight = NULL;
    int SredWeight = NULL;
    int MinWeight = NULL;
 
    Calculation(A1, A2, A3, MaxCost, MinCost, SredCost);
    Calculation(B1, B2, B3, MaxWeight, MinWeight, SredWeight);
 
    __int64 Summa = MaxCost * MaxWeight + MaxCost * SredWeight + SredCost * MinWeight;
 
    printf("Nailyshiy variant: %i \n", Summa);
 
    system("pause");
 
    return 1;
}