#include <algorithm> #include <array> #include <bitset> #include <chrono> #include <climits> #include <cmath> #include <cstring> #include <deque> #include <ext/pb_ds/assoc_container.hpp> #include <fstream> #include <iomanip> #include <iostream> #include <map> #include <numeric> #include <queue> #include <set> #include <stack> #include <string> #include <unordered_map> #include <unordered_set> #include <vector> //#include "bits/stdc++.h" using namespace std; #ifdef LOCAL #include "../../_library/cc/debug.h" #define FILE "test" #else #define debug(...) 0 #define FILE "" #endif int main() { cin.tie(nullptr)->sync_with_stdio(false); if (fopen(FILE ".in", "r")) { freopen(FILE ".in", "r", stdin); freopen(FILE ".out", "w", stdout); } int n; cin >> n; vector<int> a(n); for (auto &x : a) cin >> x; sort(a.begin(), a.end()); double prev = a[0]; for (int i = 1; i < n; ++i) { prev = (prev + a[i]) / 2; } cout << fixed << setprecision(6) << prev; }

prosjek.cpp: In function 'int main()':
prosjek.cpp:37:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   37 |     freopen(FILE ".in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
prosjek.cpp:38:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   38 |     freopen(FILE ".out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~