Submission #226579

#	Time	Username	Problem	Language	Result	Execution time	Memory
226579		origami100	Lost in the cycle (IOI19_cycle)	C++17	100 / 100	6 ms	432 KiB

cycle

#include <bits/stdc++.h>
#include "cycle.h"
using namespace std;
void escape(int N){
	int cur = 0;
	int l = 0, r = N - 1;
	bool pre = jump(0);
	while(l + 1 < r){
		int m = (l + r) / 2;
		bool res;
		if(cur > m){
			res = jump(N - cur + m);
		}else{
			res = jump(m - cur);
		}
		cur = m;
		if(res && pre){
			if(m == N / 2){
				r = m;
			}else{
				l = m;
			}
		}else if(pre && !res){
			r = m - 1;
		}else if(!pre && res){
			l = m;
		}else{
			r = m - 1;
		}
	}
	if(l == r){
		if(cur > l){
			jump(N - cur + l);
		}else{
			jump(l - cur);
		}
	}else{
		if(cur > l){
			jump(N - cur + l);
		}else{
			jump(l - cur);
		}
		if(jump(1)){
			return;
		}else{
			jump(N - 1);
		}
	}
	return;
}

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