func_code_string: #include <bits/stdc++.h>   using namespace std;   const int maxn = 1e5 + 3;   int a[maxn], b[maxn], c[maxn], sum;   int main() {     int n;     cin >> n;     for (int i = 1; i <= n; i++) {       cin >> a[i];       sum += a[i];     }     int ans = 0, cnt = 0;     for (int i = 1; i <= n; i++) {       ans += a[i];       cnt -= a[i];       b[i] = max(max(cnt, ans), b[i - 1] + a[i]);     }     ans = 0, cnt = 0;     for (int i = n; i > 0; i--) {       ans += a[i];       cnt -= a[i];       c[i] = max(max(cnt, ans), c[i + 1] + a[i]);     }     int mx = 0;     for (int i = 0; i <= n; i++) mx = max(c[i + 1] + b[i], mx);     cout << mx;   }   