#include<bits/stdc++.h>
using namespace std;
int n, xo, yo;
string ck;
bool check(int x, int y){
if(x < 1 || x > n || y < 1 || y > n) return false;
cout << "examine " << x << ' ' << y << endl;
cin >> ck;
if(ck == "false") return false;
return true;
}
int main(){
cin >> n >> xo >> yo;
int lx = xo, ly = yo, x, y;
for(int j = 0; j < 3; ++j){
for(int i = 31; i >= 0; --i){
x = lx - (1<<i), y = ly;
if(check(x, y)) lx = x, ly = y;
}
}
for(int j = 0; j < 3; ++j){
for(int i = 31; i >= 0; --i){
x = lx, y = ly = y - (1<<i);
if(check(x, y)) lx = x, ly = y;
}
}
for(int i = 31; i >= 0; --i){
x = lx - (1<<i), y = ly - (1<<i);
if(check(x, y)) lx = x, ly = y;
}
int rx = lx;
for(int i = 31; i >= 0; --i){
int cx = rx + (1<<i);
if(check(cx, ly)) rx = cx;
}
int m = 0;
x = lx, y = ly;
for (int i = 31; i >= 0; i--) {
if (check(x + (1<<i), y + (1<<i))), m += (1<<i), x += (1<<i), y += (1<<i);
}
cout << "solution " << lx + m/2 << " " << ly + m/2 << endl;
}
Compilation message
aliens.cpp: In function 'int main()':
aliens.cpp:43:43: error: expected primary-expression before ',' token
43 | if (check(x + (1<<i), y + (1<<i))), m += (1<<i), x += (1<<i), y += (1<<i);
| ^
