Bittijono

input/code.cpp: In function 'void p(int, int, int)':
input/code.cpp:10:37: error: 'pow' was not declared in this scope
   int a = int(pow(double(-1),counter));
                                     ^
input/code.cpp:17:53: error: 'log' was not declared in this scope
   p(counter+1,x - s/2,pow(2,ceil(log(double(x - s/2))/log(double(2)))));
                                                     ^
input/code.cpp:17:69: error: 'ceil' was not declared in this scope
   p(counter+1,x - s/2,pow(2,ceil(log(double(x - s/2))/log(double(2)))));
                                                                     ^
input/code.cpp:17:70: error: 'pow' was not declared in this scope
   p(counter+1,x - s/2,pow(2,ceil(log(double(x - s/2))/log(double(2)))));
                                                                      ^
input/code.cpp: In function 'int main()':
input/code.cpp:29:50: error: 'log' was not declared in this scope
   float closest = pow(2,ceil(log(double(this_int))/log(double(2))));...

#include <iostream>
#include <string>

#define uint unsigned int

void p(int counter,int x,int s)
{
	if(s == 1)
	{
		int a = int(pow(double(-1),counter));
		if(a == 1)
			std::cout << '1';
		else
			std::cout << '0';
	}
	else
		p(counter+1,x - s/2,pow(2,ceil(log(double(x - s/2))/log(double(2)))));
}

int main()
{
	int count;
	bool first = false;
	std::cin >> count;
	for(int a = 0;a < count;a++)
	{
		int this_int;
		std::cin >> this_int;
		float closest = pow(2,ceil(log(double(this_int))/log(double(2))));
		p(1,this_int,closest);
		if(a != count - 1)
			std::cout << '\n';
	}
	return 0;
}