Submission #670653

#	Time	Username	Problem	Language	Result	Execution time	Memory
670653		gustavo_d	Cave (IOI13_cave)	C++17	0 / 100	44 ms	460 KiB

cave

#include "cave.h"
#include <bits/stdc++.h>
using namespace std;

void exploreCave(int N) {
    int n = N;
    int confirmed[n];
    int test[n];
    int correspondence[n];
    for (int i = 0; i < n; i++)
        test[i] = 0;
    
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    for(int to_try = 0; to_try<n; to_try++) {
        int l = 0; int r = n-1;
        int certo = 0;
        for (int i = 0; i<r; i++) {
            if (confirmed[i] != -1) test[i] = confirmed[i];
            else test[i] = 1;
        }
        if (tryCombination(test) != to_try) certo = 1;
        while (l != r) {
            int mid = (l+r) / 2;
            for (int i = 0; i<r; i++) {
                if (confirmed[i] != -1) test[i] = confirmed[i];
                else {
                    if (i < l) test[i] = !certo;
                    else if (i < mid + l) test[i] = certo;
                    else test[i] = !certo;
                }
            }
            int tried = tryCombination(test);
            if (to_try != tried) {
                r = mid - 1;
            } else {
                l = mid;
            }
        }
        confirmed[l] = certo;
        correspondence[l] = to_try;
    }
    answer(confirmed, correspondence);
}

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