Submission #915225

#	Time	Username	Problem	Language	Result	Execution time	Memory
915225		LCJLY	Cave (IOI13_cave)	C++14	0 / 100	180 ms	600 KiB

cave

#include "cave.h"
#include <bits/stdc++.h>
using namespace std;

void exploreCave(int n) {
    //determine first switch
    int arr[n];
    memset(arr,0,sizeof(arr));
    int visited[n];
    memset(visited,0,sizeof(visited));
    int ans[n];
    
    for(int x=0;x<n;x++){
		for(int y=0;y<n;y++){
			if(!visited[y]) arr[y]=0;
		}
		int hold=tryCombination(arr);
		if(hold==-1) hold=n;
		bool amos=false;
		if(hold<=x) amos=true;
		
		int l=0;
		int r=n-1;
		int best=l;
		int mid;
		
		while(l<=r){
			mid=(l+r)/2;
			for(int y=0;y<n;y++){
				if(y<=mid&&!visited[y]){
					arr[y]=!amos;
				}
				else if(!visited[y]) arr[y]=amos;
			}
			int hold2=tryCombination(arr);
			if(hold2==-1) hold2=n;
			if(hold2<=x){
				best=mid;
				r=mid-1;
			}
			else l=mid+1;
		}
		
		visited[best]=true;
		arr[best]=!amos;
		ans[x]=best;
	}
	answer(arr,ans);
}

• Subtask 1: 0 / 12
• Subtask 2: 0 / 13
• Subtask 3: 0 / 21
• Subtask 4: 0 / 30
• Subtask 5: 0 / 24