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#include <cstdio>
#include <iostream>
#include <string>
#include <vector>
struct Sensor
{
long x, y, power;
Sensor(long xx, long yy, long pp):
x(xx), y(yy), power(pp) {}
};
int main()
{
std::vector<Sensor> sensors;
long px, py, bx, by;
do {
std::string line;
std::getline(std::cin, line);
if (std::cin.eof())
break;
auto a = sscanf(line.c_str(),
"Sensor at x=%ld, y=%ld: closest beacon is at x=%ld, y=%ld",
&px, &py, &bx, &by);
long power = std::abs(px - bx) + std::abs(py - by);
sensors.emplace_back(px, py, power);
} while (1);
std::cout << "# of sensors: " << sensors.size() << std::endl;
for (long y = 0; y <= 4000000; ++y) {
std::cout << "\r \r" << y;
fflush(stdout);
for (long x = 0; x <= 4000000; ++x) {
bool h = false;
for (auto& s : sensors) {
auto dist = std::abs(x - s.x) + std::abs(y - s.y);
if (dist <= s.power) {
long spr = (dist - std::abs(s.y - y));
x += spr - std::abs(s.x - x);
h = true;
break;
}
}
if (!h) {
std::cout << std::endl << x << ", " << y << std::endl;
return 0;
}
}
}
return 0;
}
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