#ifndef C706_H
#define C706_H
#include<iostream>
#include<string>
#include<vector>
using namespace std;
class Solution {
public:
/*
* @param : the number of "1"s on a given timetable
* @return: all possible time
*/
vector<string> binaryTime(int num) {
// Write your code here
vector<string> res;
//num is meaningful between 0 and 8
if (num == 0)
return{ "0:00" };
if (num >= 9)
return res;
vector<vector<int>> dic(6, vector<int>());// Store numbers containing 0-5 1's
for (int i = 0; i < 60; ++i)
dic[countOne(i)].push_back(i);
//Processing from the hourly portion
for (int i = 0; i <= 3; ++i)
{
//Some conditions to be met
if (num - i <= 5 && num - i >= 0)
{
//Processing minutes section
for (auto c : dic[i])
{
if (c < 12)
{
for (auto t : dic[num - i])
{
string str;
if (t >= 10)
str = to_string(c) + ":" + to_string(t);
else
str = to_string(c) + ":0" + to_string(t);
res.push_back(str);
}
}
}
}
}
return res;
}
//Calculate the number of digits containing a 1.
int countOne(int num)
{
int cnt = 0;
while (num != 0)
{
if (num & 1 != 0)
cnt++;
num = num >> 1;
}
return cnt;
}
};
#endif
