Submission #496727

#TimeUsernameProblemLanguageResultExecution timeMemory
496727ZielXOR Sum (info1cup17_xorsum)C++17
7 / 100
1690 ms4172 KiB
/** * LES GREATEABLES BRO TEAM **/ #include <bits/stdc++.h> using namespace std; using ll = long long; #define sz(x) (int)x.size() const bool FLAG = false; void setIO(const string &f = ""); void solve() { int n; cin >> n; vector<int> a(n); for (int &x: a) cin >> x; int res = 0; for (int i = 0; i < n; i++) for (int j = i; j < n; j++) res ^= (a[i] + a[j]); cout << res; } signed main() { setIO(); int tt = 1; if (FLAG) { cin >> tt; } while (tt--) { solve(); } return 0; } void setIO(const string &f) { ios_base::sync_with_stdio(false); cin.tie(nullptr); if (fopen((f + ".in").c_str(), "r")) { freopen((f + ".in").c_str(), "r", stdin); freopen((f + ".out").c_str(), "w", stdout); } }

Compilation message (stderr)

xorsum.cpp: In function 'void setIO(const string&)':
xorsum.cpp:45:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |         freopen((f + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
xorsum.cpp:46:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 |         freopen((f + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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