kadane_algorithm.cpp

// C++ program to print largest contiguous array sum
#include<iostream>
#include<climits>
using namespace std;

int maxSubArraySum(int a[], int size)
{
	int max_so_far = INT_MIN, max_ending_here = 0,
	start =0, end = 0, s=0;

	for (int i=0; i< size; i++ )
	{
		max_ending_here += a[i];

		if (max_so_far < max_ending_here)
		{
			max_so_far = max_ending_here;
			start = s;
			end = i;
		}

		if (max_ending_here < 0)
		{
			max_ending_here = 0;
			s = i + 1;
		}
	}
	cout << "Maximum contiguous sum is "
		<< max_so_far << endl;
	cout << "Starting index "<< start
		<< endl << "Ending index "<< end << endl;
}

int main()
{
	int n;
  cin>>n;
  
  int a[n];
  for(int i=0; i<n; i++)
    cin>>a[i];
  
	int max_sum = maxSubArraySum(a, n);
	return 0;
}