Submission #988728

#	Time	Username	Problem	Language	Result	Execution time	Memory
988728		Ariadna	Cave (IOI13_cave)	C++14	0 / 100	2 ms	604 KiB

cave

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

using namespace std;

int s[5000];
int pos[5000];
int door[5000];

void exploreCave(int N) {
    for (int d = 0; d < N; ++d) {
        int correct_pos = 0;
        for (int i = 0; i < N; ++i) 
            if (pos[i] != -1) s[i] = pos[i];
            else s[i] = 0;

        if (tryCombination(s) == d) correct_pos = 1;

        int l = 0, r = N-1, ans;
        while (l <= r) {
            int m = (l+r)/2;
            for (int i = 0; i < N; ++i) {
                if (pos[i] != -1) s[i] = pos[i];
                else if (i < m) s[i] = correct_pos;
                else s[i] = 1-correct_pos; 
            }
            int res = tryCombination(s);
            if (res > d || res == -1) {
                r = m-1;
            } else {
                ans = m;
                l = m+1;
            }
        }
        pos[ans] = correct_pos;
        door[ans] = d;
    }

    answer(pos, door);
}

Compilation message (stderr)

cave.cpp: In function 'void exploreCave(int)':
cave.cpp:36:19: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
   36 |         door[ans] = d;
      |         ~~~~~~~~~~^~~

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