Submission #432123

#	Time	Username	Problem	Language	Result	Execution time	Memory
432123		MilosMilutinovic	Cave (IOI13_cave)	C++14	Compilation error	0 ms	0 KiB

cave

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

int tryCombination(int S[]);

void answer(int S[], int D[]);

void exploreCave(int N) {
    int combination[N];
    for (int i = 0; i < N; i++)
        combination[i] = 0;

    bool locked[N];
    for (int i = 0; i < N; i++)
        locked[i] = false;

    int position[N];
    for (int i = 0; i < N; i++) {
        vector<int> positions;
        for (int j = 0; j < N; j++)
            if (!locked[j])
                positions.push_back(j);

        int current = tryCombination(combination);
        bool is_correct = (current == -1 || current > i);

        if (!is_correct) {
            int bot = 0, top = (int) positions.size() - 1, pos = -1;
            while (bot <= top) {
                int mid = bot + top >> 1;
                for (int j = 0; j <= mid; j++)
                    combination[positions[j]] ^= 1;

                int value = tryCombination(combination);
                if (value == -1 || value > i)
                    ans = mid, bot = mid + 1;
                else
                    top = mid - 1;

                for (int j = 0; j <= mid; j++)
                    combination[positions[j]] ^= 1;
            }
            assert(pos != -1);
            combination[positions[pos]] = 1;
            locked[positions[pos]] = true;
            position[ans] = i;
        } else {
            int bot = 0, top = (int) positions.size() - 1, pos = -1;
            while (bot <= top) {
                int mid = bot + top >> 1;
                for (int j = 0; j <= mid; j++)
                    combination[positions[j]] ^= 1;

                int value = tryCombination(combination);
                if (value == i)
                    ans = mid, bot = mid + 1;
                else
                    top = mid - 1;

                for (int j = 0; j <= mid; j++)
                    combination[positions[j]] ^= 1;
            }
            assert(pos != -1);
            locked[positions[pos]] = true;
            position[ans] = i;
        }
    }
    answer(combination, position);
}

Compilation message (stderr)

cave.cpp: In function 'void exploreCave(int)':
cave.cpp:31:31: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   31 |                 int mid = bot + top >> 1;
      |                           ~~~~^~~~~
cave.cpp:37:21: error: 'ans' was not declared in this scope; did you mean 'abs'?
   37 |                     ans = mid, bot = mid + 1;
      |                     ^~~
      |                     abs
cave.cpp:47:22: error: 'ans' was not declared in this scope; did you mean 'abs'?
   47 |             position[ans] = i;
      |                      ^~~
      |                      abs
cave.cpp:51:31: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   51 |                 int mid = bot + top >> 1;
      |                           ~~~~^~~~~
cave.cpp:57:21: error: 'ans' was not declared in this scope; did you mean 'abs'?
   57 |                     ans = mid, bot = mid + 1;
      |                     ^~~
      |                     abs
cave.cpp:66:22: error: 'ans' was not declared in this scope; did you mean 'abs'?
   66 |             position[ans] = i;
      |                      ^~~
      |                      abs