Submission #1039618

#	Time	Username	Problem	Language	Result	Execution time	Memory
1039618		AC2K	산악 구조대 (JOI13_mountain)	C++17	0 / 100	4 ms	860 KiB

mountain

#include<bits/stdc++.h>
#include "grader.h"

using namespace std;

void Rescue(int R, int C, int RS, int CS, int X)
{
  int upper = max(RS - 1, R - RS) + max(CS - 1, C - CS), lower = 0;
  
  auto calc = [&](int d)
  {
    int res = 1e9;
    for (int i = 1; i <= R; ++i)
    {
      int dd = d - abs(i - RS);
      if (d < dd)
        continue;
      for (auto j : {CS - dd, CS + dd})
      {
        if (j <= 0 || j > C)
          continue;

        int H = Measure(i, j);
        if (H == X)
        {
          Pinpoint(i, j);
          return -1;
        }
        res = min(res, H);
      }
    }
    return res;
  };

  
  if (calc(upper) == -1)
    return; 

  while (upper - lower > 1)
  {
    int mid = (upper + lower) / 2;
    int H = calc(mid);
    if (H == -1)
      return;
    (H >= X ? lower : upper) = mid;
  }

  if (calc(lower) == -1)
    return;
  if (calc(upper) == -1)
    return;
}

• Subtask 1: 0 / 20
• Subtask 2: 0 / 80