Submission #551388

#	Time	Username	Problem	Language	Result	Execution time	Memory
551388		Olympia	Odd-even (IZhO11_oddeven)	C++17	0 / 100	0 ms	212 KiB

oddeven

#include <iostream>
#include <vector>
#include <iomanip>
#include <algorithm>
#include <cassert>
#include <map>
#include <complex>
#include <cmath>
#include <set>
#include <queue>

using namespace std;

#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int64_t n;
    cin >> n;
    int64_t sq = (1 + sqrt(1 + 8 * n)) / 2;
    cout << sq * sq + 2 * (n - (sq + 1) * sq / 2) << '\n';
}

Compilation message (stderr)

oddeven.cpp:15: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
   15 | #pragma GCC optimization ("O3")
      | 
oddeven.cpp:16: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
   16 | #pragma GCC optimization ("unroll-loops")
      |

• Subtask 1: 0 / 100