class Solution:
    
    def book(self, nums):
        
        result = [] 
        
        # to track the booked times 
        b_start, b_end = float('inf'), float('-inf')

        for start, end in nums:
            
            if start >= b_end or end <= b_start:
                
                b_start = min(start, b_start)
                b_end = max(b_end, end)
                
                result.append(True)

            else:
                result.append(False)
        
        return result