check_if_all_the_integers_in_a_range_are_covered.py

# You are given a 2D integer array ranges and two integers left and right. Each ranges[i] = [starti, endi] represents an inclusive interval 
# between starti and endi.

# Return true if each integer in the inclusive range [left, right] is covered by at least one interval in ranges. Return false otherwise.

# An integer x is covered by an interval ranges[i] = [starti, endi] if starti <= x <= endi.

 

# Example 1:

# Input: ranges = [[1,2],[3,4],[5,6]], left = 2, right = 5
# Output: true
# Explanation: Every integer between 2 and 5 is covered:
# - 2 is covered by the first range.
# - 3 and 4 are covered by the second range.
# - 5 is covered by the third range.
# Example 2:

# Input: ranges = [[1,10],[10,20]], left = 21, right = 21
# Output: false
# Explanation: 21 is not covered by any range.
 

# Constraints:

# 1 <= ranges.length <= 50
# 1 <= starti <= endi <= 50
# 1 <= left <= right <= 50

class Solution:
    def isCovered(self, ranges: List[List[int]], left: int, right: int) -> bool:
        # loop throught the range from left and right, inclusively
        for i in range(left, right + 1):
            # check if the number is between any interval
            # put this variable to see if the number is found in any range
            in_range = False
            for interval in ranges:
                # if the number is found, we set the boolean true
                if i >= interval[0] and i <= interval[1]:
                    in_range = True
                    break
            if not in_range:
                return False
        
        return True