func_code_string: #include <bits/stdc++.h>   using namespace std;   long long int n, ar[100001], max_s[100001], max_e[100001], pre_s[100001],       pre_e[100001], ans = INT_MIN;   int main() {     cin >> n;     for (int i = 0; i < n; i++) cin >> ar[i];     for (int i = 1; i < n; i++) pre_s[i] = pre_s[i - 1] + ar[i - 1];     for (int i = n - 2; i >= 0; i--) pre_e[i] = pre_e[i + 1] + ar[i + 1];     max_e[n - 1] = abs(ar[n - 1]);     max_s[0] = abs(ar[0]);     for (int i = n - 2; i >= 0; i--)       max_e[i] = max(ar[i] + max_e[i + 1], -(ar[i] + pre_e[i]));     for (int i = 1; i < n; i++)       max_s[i] = max(ar[i] + max_s[i - 1], -(ar[i] + pre_s[i]));     ans = max(ans, max_e[0]);     ans = max(ans, max_s[n - 1]);     for (int i = 0; i < n - 1; i++) ans = max(ans, max_s[i] + max_e[i + 1]);     cout << ans;     return 0;   }   