#include "aliens.h"
#include <bits/stdc++.h>
using namespace std;
#define int long long
pair<signed, signed> help_aliens(signed n, signed sx, signed sy) {
int l, r, b;
int low = sx, high = n;
for (int i = 0; sx + (1 << i) <= n; i ++) {
signed nx = sx + (1 << i);
if (!use_device(nx, sy)) {
high = nx;
if (i != 0) {
low = sx + (1 << (i-1));
}
break;
}
}
while (high > low) {
signed mid = (high + low + 1)/2;
if (use_device(mid, sy)) low = mid;
else high = mid - 1;
}
r = low;
low = 1, high = sx;
for (int i = 0; sx - (1 << i) > 0; i ++) {
signed nx = sx - (1 << i);
if (!use_device(nx, sy)) {
low = nx;
if (i != 0) {
high = sx - (1 << (i-1));
}
break;
}
}
while (high > low) {
signed mid = (high + low)/2;
if (use_device(mid, sy)) high = mid;
else low = mid + 1;
}
l = low;
low = 1, high = sy;
for (int i = 0; sy - (1 << i) > 0; i ++) {
signed ny = sy - (i << i);
if (!use_device(sx, ny)) {
low = ny;
if (i != 0) {
high = sy - (1 << (i-1));
}
break;
}
}
while (high > low) {
signed mid = (high + low)/2;
if (use_device(sx, mid)) high = mid;
else low = mid + 1;
}
b = low;
signed cx = (l + r)/2, cy = b + (r - l)/2;
int m = r - l + 1;
int x1 = 0, x2 = 0;
for (int i = 1; i <= 4; i ++) {
signed qx = cx - 2*m*i;
if (qx < 1) break;
if (use_device(qx, cy)) x1 ++;
else break;
}
for (int i = 1; i <= 4; i ++) {
signed qx = cx + 2*m*i;
if (qx > n) break;
if (use_device(qx, cy)) x2 ++;
else break;
}
int y1 = 0, y2 = 0;
for (int i = 1; i <= 4; i ++) {
int qy = cy - 2*m*i;
if (qy < 1) break;
if (use_device(cx, qy)) y1 ++;
else break;
}
for (int i = 1; i <= 4; i ++) {
int qy = cy + 2*m*i;
if (qy > n) break;
if (use_device(cx, qy)) y2 ++;
else break;
}
cx += m*(x2 - x1);
cy += m*(y2 - y1);
return {cx, cy};
}
Compilation message
aliens.cpp:1:10: fatal error: aliens.h: No such file or directory
1 | #include "aliens.h"
| ^~~~~~~~~~
compilation terminated.
