제출 #1245262

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1245262		kchu_z	동굴 (IOI13_cave)	C++20	컴파일 에러	0 ms	0 KiB

cave

#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;

const int MAXN = 5e3 + 10;
int s[MAXN], signs[MAXN], n, current_sign = 2;

extern int tryCombination(int[]);

int get_next(vector <int>& fixed, vector <int>& rest) {
    if (rest.size() == 1) return rest.front();

    vector <int> a, b;
    int m = rest.size() / 2;

    for (int i = 0; i < m; i++) {
        a.push_back(rest[i]);
    }

    for (int i = m; i < rest.size(); i++) {
        b.push_back(rest[i]);
    }

    for (int x : fixed) {
        s[x] = signs[x];
    }

    for (int x : a) {
        s[x] = current_sign;
    }

    for (int x : b) {
        s[x] = 1 - current_sign;
    }

    int len = tryCombination(s);

    if (len > fixed.size()) { /// potential error
        return get_next(fixed, a);
    }

    return get_next(fixed, b);
}

void exploreCave(int n) {
    vector <int> fixed, rest;

    for (int i = 0; i < n; i++) {
        rest.push_back(i);
    }

    for (int i = 0; i < n; i++) {
        for (int x : fixed) {
            s[x] = signs[x];
        }

        for (int x : rest) {
            s[x] = 0;
        }

        int len = tryCombination(s);

        if (len > fixed.size()) {
            current_sign = 0;
        } else {
            current_sign = 1;
        }

        int pos = get_next(fixed, rest);
        signs[pos] = current_sign;

        fixed.push_back(pos);
        rest.erase(find(rest.begin(), rest.end(), pos));
    }

    answer(signs);
}

컴파일 시 표준 에러 (stderr) 메시지

cave.cpp: In function 'void exploreCave(int)':
cave.cpp:77:5: error: 'answer' was not declared in this scope
   77 |     answer(signs);
      |     ^~~~~~