Submission #1289465

#	Time	Username	Problem	Language	Result	Execution time	Memory
1289465		BlockOG	Lost in the cycle (IOI19_cycle)	C++20	100 / 100	1 ms	428 KiB

cycle

#include <bits/stdc++.h>

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#define fo(i, a, b) for (auto i = (a); i < (b); i++)
#define of(i, a, b) for (auto i = (b); i-- > (a);)
#define f first
#define s second
#define pb push_back
#define lb lower_bound
#define ub upper_bound
#define be(a) a.begin(), a.end()
using namespace std;

int ____init = []{
    ios::sync_with_stdio(false);
    cin.tie(NULL), cout.tie(NULL);
    return 0;
}();

bool jump(int x);

int n, i;
bool jum(int x) {
    bool res = jump((n + x - i) % n);
    i = x;
    return res;
}

void escape(int _n) {
    n = _n, i = 0;
    int l = 1, r = n - 1;
    while (l < r) {
        int mid = (l + r) / 2;
        if (jum(mid)) r = mid;
        else l = mid + 1;
    }

    if (l == 1 && jum(0)) l = 0;
    jum(l + n / 2);
}

• Subtask 1: 11 / 11
• Subtask 2: 33 / 33
• Subtask 3: 56 / 56