제출 #988730

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
988730		Ariadna	동굴 (IOI13_cave)	C++14	100 / 100	202 ms	780 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 i = 0; i < N; ++i) pos[i] = -1;

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

    answer(pos, door);
}

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