Submission #1092188

#	Time	Username	Problem	Language	Result	Execution time	Memory
1092188		pubin06	Cave (IOI13_cave)	C++14	Compilation error	0 ms	0 KiB

cave

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

const int MXn = 5005;

//int n = 4, S[] = {1, 1, 1, 0}, D[] = {3, 1, 0, 2};

//int tryCombination(int a[]) {
//    int ans = n;
//    cout << "[ ";
//    for (int i = 0; i < n; i++) {
//        cout << a[i] << ' ';
//        if (a[i] != S[i]) {
//            ans = min(ans, D[i]);
//        }
//    }
//    cout << "]: " << ((ans == n) ? -1 : ans) << '\n';
//    return (ans == n) ? -1 : ans;
//}
int ask(int a[]) {
    int res = tryCombination(a);
    if (res < 0) res = n;
    return res;
}

int ans[MXn], arr[MXn], pos[MXn]; bool ok[MXn];
void exploreCave(int N) {
    n = N;
    memset(ans, 0, sizeof ans);
    for (int i = 0; i < N; i++) {
        int t = tryCombination(ans) == i ? 0 : 1;
        int l = 0, r = N - 1, mid, res;
        while (l <= r) {
            mid = (l + r) >> 1;
            for (int i = 0; i < N; i++) {
                if (ok[i]) arr[i] = ans[i];
                else if (i <= mid) arr[i] = 1;
            }
            int tmp = ask(arr);
            if (t) {
                if (tmp == i) {
                    res = mid;
                    r = mid - 1;
                } else l = mid + 1;
            } else {
                if (tmp > i) {
                    res = mid;
                    r = mid - 1;
                } else l = mid + 1;
            }
            for (int i = 0; i < N; i++) {
                if (ok[i]) arr[i] = ans[i];
                else if (i <= mid) arr[i] = 0;
            }
        }
        ok[res] = true;
        ans[res] = t ^ 1;
        pos[res] = i;
    }
//    for (int i = 0; i < N; i++) cout << ans[i] << ' ';
//    cout << '\n';
//    for (int i = 0; i < N; i++) cout << pos[i] << ' ';
    answer(ans, pos);
}

Compilation message (stderr)

cave.cpp: In function 'int ask(int*)':
cave.cpp:23:24: error: 'n' was not declared in this scope
   23 |     if (res < 0) res = n;
      |                        ^
cave.cpp: In function 'void exploreCave(int)':
cave.cpp:29:5: error: 'n' was not declared in this scope
   29 |     n = N;
      |     ^