Submission #981520

#	Time	Username	Problem	Language	Result	Execution time	Memory
981520		batsukh2006	Cave (IOI13_cave)	C++17	100 / 100	282 ms	600 KiB

cave

#include "cave.h"
#include<bits/stdc++.h>
using namespace std;
void exploreCave(int N){
	int pos[N],ans[N];
	vector<bool> vis(N);
	memset(pos,0,sizeof(pos));
    for(int i=0; i<N; i++){
    	int tmp=0,p=0;
    	if(tryCombination(pos)==i) tmp=1;
		int l=0,r=N-1;
		while(l<=r){
			int m=l+(r-l)/2;
			for(int z=0; z<=m; z++){
				if(!vis[z]) pos[z]^=1;
			}
			if(tmp){
				if(tryCombination(pos)==i) l=m+1,p=pos[l]^1;
				else r=m-1,tmp^=1,p=pos[l];
			}else{
				if(tryCombination(pos)==i) r=m-1,p=pos[l]^1,tmp^=1;
				else l=m+1,p=pos[l];
			}
		}
		vis[l]=1;
		ans[l]=i;
		pos[l]=p;
    }
    answer(pos,ans);
}

• Subtask 1: 12 / 12
• Subtask 2: 13 / 13
• Subtask 3: 21 / 21
• Subtask 4: 30 / 30
• Subtask 5: 24 / 24