제출 #992844

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
992844		vjudge1	동굴 (IOI13_cave)	C++17	100 / 100	290 ms	600 KiB

cave

#include "cave.h"
void exploreCave(int n) {
    int sure[n] = {}, correct[n] = {}, index[n] = {};
    for (int i = 0; i < n; i++) {
        int open = tryCombination(correct) == i;
        int l = 0, r = n-1;
        while (l < r) {
            const int mid = (l+r)/2;
            int cpy[n];
            for (int i = 0; i < n; i++)
                cpy[i] = correct[i];
            if (!open) {
                for (int i = mid+1; i < n; i++)
                    if (!sure[i])				
                        cpy[i] = 1;
            }
            else {
                for (int i = 0; i <= mid; i++)
                    if (!sure[i])
                        cpy[i] = 1;
            }
            if (tryCombination(cpy) == i)
                l = mid+1;
            else
                r = mid;
        } 
        index[l] = i, correct[l] = open, sure[l] = 1;
    }
    answer(correct, index);
}

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