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Maximum Subarray sum

 Given an array of n integers. The task is to find the maximum sum of values in a contiguous, nonempty subarray.

Ex:-   [ -2 , -5 , 6 , -2 , -3 , 1 , 5 , -6 ]  

maxsubarraysum =  7  

and subarray is [ 6 , -2 , -3 , 1 , 5 ]

Java

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 import java.util.*;
 public class MaxSubArraySum{
     public static void main(String []args){
        Scanner sc = new Scanner(System.in);
        int size = sc.nextInt();
        int ans = Integer.MIN_VALUE, msf = Integer.MIN_VALUE;
        for(int i=0; i<size; i++){
            int num = sc.nextInt();
            if(i==0 && num<0)
                msf = num;
            else
                msf = Math.max(num, num+msf);
            ans = Math.max(ans, msf);
        }
        System.out.println("sum:"+ans);
     }
 }

Python



import sys
size = int(input())
ans, msf = -sys.maxsize-1, -sys.maxsize-1 
for i in range(0,size):
    num = int(input())
    msf = max(num, msf+num)
    ans = max(msf, ans)
print("sum :",ans)

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