c-计蒜客 最大子阵列

#include <iostream>   
using namespace std ;  
const int maxn = 100000;   
int main()  
{  
    int A[maxn];  
    int n ;  
    cin >> n ;  
    for ( int i = 0 ; i < n ; ++i)
    {
        cin >> A[i];
    }  
    int thissum = 0 , maxsum = 0 , ele = A[0];  
    for ( int i = 0 ; i < n ; ++i)  
    {  
          thissum += A[i];  
          if( thissum > maxsum)  
              maxsum = thissum ;  
          if(thissum < 0)  
               thissum = 0 ;  
          if( A[i] > ele)  
              ele = A[i];  
    }  
    if(maxsum==0) 
    {
        cout<<ele;
    }else
    {
        maxsum=maxsum > ele ? maxsum:ele;
        cout<<maxsum;
    }     
}