Submission #62835

#	Time	Username	Problem	Language	Result	Execution time	Memory
62835		mhnd	동굴 (IOI13_cave)	C++14	100 / 100	420 ms	596 KiB

cave

#include "cave.h"
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
const int N = 2e5+50;
const ll oo = 1e18;
const ll mod = 1e9+7;

int s[5010],d[5010],tmp[5010];
bool vis[5010];

void exploreCave(int n){
    for(int i=0;i<n;i++){
    	int md,lo=0,hi=n-1,ans=0;
    	int to = tryCombination(s);
    	int t = (to>i || to==-1)?0:1;
    	while(lo!=hi){
    		md = (lo+hi)/2;
    		for(int i=lo;i<=md;i++)if(!vis[i])s[i]=!s[i];
    		to = tryCombination(s);
    		for(int i=lo;i<=md;i++)if(!vis[i])s[i]=!s[i];
    		int c = (to>i || to==-1)?0:1;
    		if(c != t)hi = md;
    		else lo = md+1;
    	}
    	s[lo]=t;
    	d[lo]=i;
    	vis[lo]=1;
    }
    answer(s,d);
}

Compilation message (stderr)

cave.cpp: In function 'void exploreCave(int)':
cave.cpp:17:25: warning: unused variable 'ans' [-Wunused-variable]
      int md,lo=0,hi=n-1,ans=0;
                         ^~~

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