Hacktober2021-cpp-py/Largest-sum-contiguous-subarray.cpp at main · Masoom9587/Hacktober2021-cpp-py · GitHub

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#include<bits/stdc++.h>
using namespace std;


 // } Driver Code Ends
class Solution{
    public:
    // arr: input array
    // n: size of array
    //Function to find the sum of contiguous subarray with maximum sum.
    long long maxSubarraySum(int arr[], int n){

        // Your code here
        long long int max_so_far=arr[0];
        long long int max_ending_here=arr[0];
        for(int i=1;i<n;i++)
        {
            if(max_ending_here+arr[i]>arr[i])
            {
                max_ending_here=max_ending_here+arr[i];

            }
            else
            max_ending_here=arr[i];
            max_so_far=max(max_so_far,max_ending_here);
        }
        return max_so_far;

    }
};

// { Driver Code Starts.

int main()
{
    int t,n;

    cin>>t; //input testcases
    while(t--) //while testcases exist
    {

        cin>>n; //input size of array

        int a[n];

        for(int i=0;i<n;i++)
            cin>>a[i]; //inputting elements of array

        Solution ob;

        cout << ob.maxSubarraySum(a, n) << endl;
    }
}
  // } Driver Code Ends