func_code_string: #include <bits/stdc++.h>   using namespace std;   double f(double m, vector<int> &v) {     int n = v.size();     vector<long double> v2(n);     for (int i = 0; i < (n); i++) v2[i] = v[i] - m;     long double mx_otr = 0;     long double mn_otr = 0;     long double cur = 0;     for (int i = 0; i < (n); i++) {       cur += v2[i];       if (cur < 0) cur = 0;       mx_otr = max(mx_otr, cur);     }     cur = 0;     for (int i = 0; i < (n); i++) {       cur += v2[i];       if (cur >= 0) cur = 0;       mn_otr = min(mn_otr, cur);     }     return max(mx_otr, abs(mn_otr));   }   inline void solve() {     int n;     cin >> n;     vector<int> v(n);     for (int i = 0; i < (n); i++) cin >> v[i];     long double l = -10000, r = 10000;     while (abs(r - l) > 1e-12) {       long double m1 = l + (r - l) / 3;       long double m2 = r - (r - l) / 3;       if (f(m1, v) <= f(m2, v))         r = m2;       else         l = m1;     }     cout << fixed << setprecision(10) << f(l + (r - l) / 2.0, v);   }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);     int q = 1;     while (q--) {       solve();       cout <<   n ;     }   }   