Bittijono

input/code.cpp: In function 'int solve(ll)':
input/code.cpp:73:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
input/code.cpp:29:3: warning: 'is_a' may be used uninitialized in this function [-Wmaybe-uninitialized]
   if (is_a) {
   ^

#include <iostream>
#include <string>
#include <vector>
#include <sstream>
#include <cmath>

typedef long long ll;

/* ABBA BAAB BAAB ABBA BAAB ABBA ABBA BAAAB */

using namespace std;

int atoi (string c) {
	stringstream s;
	int i;
	s << c;
	s >> i;
	return i;
}

int
solve (ll i) {
	bool is_a;
	int a[4] = {0, 1, 1, 0};
	int b[4] = {1, 0, 0, 1};
	ll max = (ll)pow (2.0, 60.0); 
	int j;
	for (j = 0; j < 30; j++) {
		if (is_a) {
			if (j == 29) {
				return a[i];
			} else {
				if (i < max/4) {
					is_a = true;
					max = max/4;
				} else if (i > max/4 && i < 2*(max/4)) {
					is_a = false;
					max = max/4;
					i -= max/4;
				} else if (i > 2*(max/4) && i < 3*(max/4)) {
					is_a = false;
					max = max/4;
					i -= 2*(max/4);
				} else {
					is_a = true;
					max = max/4;
					i -= 3*(max/4);
				}
			}
		} else {
			if (j == 29) {
				return b[i];
			} else {
				if (i < max/4) {
					is_a = true;
					max = max/4;
				} else if (i > max/4 && i < 2*(max/4)) {
					is_a = false;
					max = max/4;
					i -= max/4;
				} else if (i > 2*(max/4) && i < 3*(max/4)) {
					is_a = false;
					max = max/4;
					i -= 2*(max/4);
				} else {
					is_a = true;
					max = max/4;
					i -= 3*(max/4);
				}	
			}
		}
	}
}

int
main ()
{
	string num_s;
	int num, i;
	cin >> num_s;
	num = atoi (num_s);
	vector<int> input(num);
	for (i = 0; i < num; i++) {
		num_s = "";
		cin >> num_s;
		input[i] = (ll)atoi (num_s) -1;
	}
	for (i = 0; i < num; i++)
		cout << solve (input[i]) << "\n";
	return 0;
}

Test 1

Group: 1

Verdict: WRONG ANSWER

Test 2

Group: 2

Verdict: RUNTIME ERROR

Test 3

Group: 3

Verdict: RUNTIME ERROR