В чем ошибка.

#include <iostream>
#include <fstream>
#include <algorithm>
#include <numeric>
 
int sumpositive (int result, int value)
{
    return (value>0) ? (result+value) : result;
}
 
int main()
{
    std::ifstream ifs ("input.txt");
    std::ofstream ofs ("output.txt");
 
    int SIZE;
    ifs >> SIZE;
    int *MAS = new int [SIZE];
 
    for (int i=0; i<SIZE; i++)
        ifs >> MAS[i];
 
    int index_min = std::min_element (MAS, MAS+SIZE) - MAS;
    int index_max = std::max_element (MAS, MAS+SIZE) - MAS;
    if (index_min > index_max) std::swap (index_min, index_max);
 
    long sum = std::accumulate (MAS, MAS+SIZE, 0, sumpositive);
    long mult = std::accumulate (MAS+index_min+1, MAS+index_max, 1, std::multiplies <int> ());
 
    ofs << sum << " " << mult << std::endl;
 
    ifs.close ();
    ofs.close ();
    delete []MAS;
 
    return 0;
}

#include <functional>

#include "stdafx.h"