Submission #99804

#	Time	Username	Problem	Language	Result	Execution time	Memory
99804		MohamedAhmed0	Cave (IOI13_cave)	C++14	100 / 100	508 ms	640 KiB

cave

#include "cave.h"
#include <bits/stdc++.h>
 
using namespace std ;
 
const int MAX = 5005 ;
int s[MAX] , d[MAX] , arr[MAX] , last , done[MAX];
int now ;
 
bool check(int l , int mid)
{
    for(int i = l ; i <= mid ; ++i)
    {
        if(done[i])
            continue ;
        s[i] = !s[i] ;
    }
    int x = tryCombination(s) ;
    for(int i = l ; i <= mid ; ++i)
    {
        if(done[i])
            continue;
        s[i] = !s[i] ;
    }
    if(x > now || x == -1)
        return 1 ;
    return 0 ;
}
 
void exploreCave(int N)
{
    memset(s , 0 , sizeof(s));
    for(int i = 0 ; i < N ; ++i)
    {
        now = i ;
        bool t = false ;
        last = tryCombination(s) ;
        if(last > i || last == -1)
        {
            for(int j = 0 ; j < N ; ++j)
            {
                if(done[j])
                    continue;
                s[j] = !s[j] ;
            }
        }
        int l = 0 , r = N-1 , ans = N-1;
        while(l <= r)
        {
            int mid = (l + r) / 2 ;
            if(check(l , mid))
                ans = mid , r = mid-1 , t = true;
            else
                l = mid+1 ;
        }
        d[ans] = i ;
        done[ans] = 1 ;
        s[ans] = !s[ans] ;
    }
    answer(s , d) ;
}

Compilation message (stderr)

cave.cpp: In function 'void exploreCave(int)':
cave.cpp:36:14: warning: variable 't' set but not used [-Wunused-but-set-variable]
         bool t = false ;
              ^

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