Submission #992828

#	Time	Username	Problem	Language	Result	Execution time	Memory
992828		Muaath_5	Cave (IOI13_cave)	C++17	100 / 100	279 ms	592 KiB

cave

#include "cave.h"
void exploreCave(int n) {
  int sure[n] = {}, correct[n] = {}, index[n] = {};
  for (int i = 0; i < n; i++) {
    int open = tryCombination(correct) == i;
    int l = 0, r = n-1;
    while (l < r) {
      const int mid = (l+r)/2;
      int cpy[n];
      for (int i = 0; i < n; i++)
        cpy[i] = correct[i];
      if (!open) {
        for (int i = mid+1; i < n; i++)
          if (!sure[i])				
            cpy[i] = 1;
      }
      else {
        for (int i = 0; i <= mid; i++)
          if (!sure[i])
            cpy[i] = 1;
      }
      if (tryCombination(cpy) == i)
        l = mid+1;
      else
        r = mid;
    } 
    index[l] = i, correct[l] = open, sure[l] = 1;
  }
  answer(correct, index);
}

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