Envío 6168

Código

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

int maxSumSubArr(int *arr, int l, int r){
    if(l >= r)
        return arr[l];
    int m = l + (r - l) / 2;
    long long sl = maxSumSubArr(arr, l, m);
    long long rl = maxSumSubArr(arr, m+1, r);
    long long best = max(sl, rl);

    long long bsl = arr[m];
    sl = arr[m];
    for(int i=m-1; i>=l; i--){
        sl += arr[i];
        bsl = max(bsl, sl);
    }

    long long bsr = arr[m+1];
    rl = arr[m+1];
    for(int i=m+2; i<=r; i++){
        rl += arr[i];
        bsr = max(bsr, rl);
    }

    return max(best, bsl+bsr);
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL); 
    // your code goes here
    int n;
    cin >> n;
    int arr[n];
    for(int i=0;i<n;i++)
        cin >> arr[i];
    int best = maxSumSubArr(arr, 0, n-1);
    cout << best << endl;
	return 0;
}