Submission #1313387

#	Time	Username	Problem	Language	Result	Execution time	Memory
1313387		shirokito	Cave (IOI13_cave)	C++20	Compilation error	0 ms	0 KiB

cave

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

#define all(a) (a).begin(), (a).end()
#define fi first
#define se second

using ll = long long;

const int N = 5000 + 24;

void exploreCave(int N) {
    int n = N;

    vector<int> state(n, 0), can(n, 1);

    for (int i = 0; i < n; i++) {
        int k = tryCombination(state);
        int m = tryCombination(can);

        if (m != -1 && m < k) {
            int pos = -1;

            for (int l = 0, r = n - 1; l <= r; ) {
                int mid = (l + r) >> 1;

                vector<int> new_state = state;

                for (int i = 0; i <= mid; i++) {
                    if (can[i]) new_state[i] = 1;
                }

                int jury_ans = tryCombination(new_state);

                if (jury_ans != -1 &&  jury_ans < k) {
                    pos = mid;
                    r = mid - 1;
                }
                else l = mid + 1;
            }

            if (pos != -1) {
                can[pos] = 0;
                // cout << "POS = " << pos << "\n";
            }
        }

        else {
            int pos = -1;
        
            for (int l = 0, r = n - 1; l <= r; ) {
                int mid = (l + r) >> 1;

                vector<int> new_state = state;

                for (int i = 0; i <= mid; i++) {
                    if (can[i]) new_state[i] = 1;
                }

                int jury_ans = tryCombination(new_state);

                if (jury_ans == -1 || jury_ans > k) {
                    pos = mid;
                    r = mid - 1;
                }
                else l = mid + 1;  
            }

            if (pos != -1) {
                // cout << "POS = " << pos << "\n";
                state[pos] = 1;
            }
        }
    }

    vector<int> d(n);

    for (int i = 0; i < n; i++) {
        vector<int> new_state = state;
        new_state[i] ^= 1;
        d[i] = tryCombination(new_state);
    }

    return answer(state, d);
}

Compilation message (stderr)

cave.cpp: In function 'void exploreCave(int)':
cave.cpp:18:17: error: 'tryCombination' was not declared in this scope
   18 |         int k = tryCombination(state);
      |                 ^~~~~~~~~~~~~~
cave.cpp:81:16: error: 'tryCombination' was not declared in this scope
   81 |         d[i] = tryCombination(new_state);
      |                ^~~~~~~~~~~~~~
cave.cpp:84:12: error: 'answer' was not declared in this scope
   84 |     return answer(state, d);
      |            ^~~~~~