#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;
}
