Function to return the maximum sum subarray
int maxSumSubArr ( vector < int > a ) { int max_so_far = 0 , max_ending_here = 0 ; for ( int i = 0 ; i < a . size ( ) ; i ++ ) { max_ending_here = max_ending_here + a [ i ] ; if ( max_ending_here < 0 ) max_ending_here = 0 ; else if ( max_so_far < max_ending_here ) max_so_far = max_ending_here ; } return max_so_far ; }