Submission #385807

#	Time	Username	Problem	Language	Result	Execution time	Memory
385807		Pichon5	Cave (IOI13_cave)	C++17	0 / 100	527 ms	384 KiB

cave

#include "cave.h"
#include<bits/stdc++.h>
#include <fstream>
#define lcm(a,b) (a/__gcd(a,b))*b
#define fast ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define ll long long int
#define vi vector<int>
#define vll vector<ll>
#define pb push_back
#define F first
#define S second
//"\n"
using namespace std;
void exploreCave(int N){
    int n=N;
    int d[n];
    int s[n];
    vector<bool>vis(n,false);
    for(int i=0;i<n;i++){
        int c=0;
        for(int l=0;l<n;l++){
            if(!vis[l])s[l]=0;
        }
        int x=tryCombination(s);
        if(x==i)c=1;
        int b=0,e=n;
        int pos;
        while(b<=e){
            int mid=(b+e)/2;
            for(int l=0;l<n;l++){
                if(vis[l])continue;
                if(l>=b && l<=mid){
                    s[l]=c;
                }else{
                    s[l]=!c;
                }
            }
            x=tryCombination(s);
            if(x>i or x==-1){
                pos=b;
                e=mid-1;
            }else{
                b=mid+1;
            }
        }
        //pos es el switch que abrio la puerta
        vis[pos]=true;
        d[pos]=i;
        s[pos]=!c;
    }
    answer(s,d);
}

Compilation message (stderr)

cave.cpp: In function 'void exploreCave(int)':
cave.cpp:49:15: warning: 'pos' may be used uninitialized in this function [-Wmaybe-uninitialized]
   49 |         s[pos]=!c;
      |         ~~~~~~^~~

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