Submission #869099

#	Time	Username	Problem	Language	Result	Execution time	Memory
869099		AtabayRajabli	Cave (IOI13_cave)	C++17	0 / 100	1 ms	348 KiB

cave

#include "cave.h"
 
void exploreCave(int n) {
    int q = 0;
    int a[n], ans[n], d[n];
    for(int i = 0; i<n; i++)
    {
        a[i] = 0;
    }

    for(int i = 0; i<n; i++)
    {   
        a[i] ^= 1;
        int l = 0, r = n-1, q = tryCombination(a);
        if(q == -1)q = n;

        while(l < r)
        {
            int mid = (l + r) / 2;
            a[mid] ^= 1;

            int k = tryCombination(a);
            if(k == -1)k = n;
            if(k == q)
            {
                r = mid - 1;
                a[mid] ^= 1;
            }
            else if(k < q)
            {
                l = mid + 1;
                d[mid] = k;
                a[mid] ^= 1;
            }
            else if(k == q + 1)
            {
                d[mid] = q;
                break;
            }
        }
    }
    
    answer(a, d);
}

Compilation message (stderr)

cave.cpp: In function 'void exploreCave(int)':
cave.cpp:4:9: warning: unused variable 'q' [-Wunused-variable]
    4 |     int q = 0;
      |         ^
cave.cpp:5:15: warning: unused variable 'ans' [-Wunused-variable]
    5 |     int a[n], ans[n], d[n];
      |               ^~~

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