#0249

Can Attend All Meetings

EasyDSA18 min10 XP

Problem

Given intervals [start, end], return True if no meetings overlap. A meeting ending at time t does not overlap with another starting at time t.

Why This Matters

Interval overlap is the base pattern behind calendars, scheduling, sweep-line algorithms, and resource allocation.

Function Signature

def can_attend_meetings(intervals):

Examples

Example 1

Inputintervals = [[0, 30], [5, 10], [15, 20]]

OutputFalse

The meeting from 5 to 10 starts before 0 to 30 ends.

Constraints

Return the exact requested value.
Handle empty or small inputs when the prompt allows them.
Prefer the target DSA pattern over brute force when the input can grow.

CodePython

def can_attend_meetings(intervals):
    """
    Input example: intervals = [[0, 30], [5, 10], [15, 20]]
    Return: False
    Return the value from the function so the tests can compare it. Do not print unless the prompt asks.
    """
    # write your code here
    return True

def can_attend_meetings(intervals):
    """
    Input example: intervals = [[0, 30], [5, 10], [15, 20]]
    Return: False
    Return the value from the function so the tests can compare it. Do not print unless the prompt asks.
    """
    # write your code here
    return True

Visible browser tests run here when available.

Testcases2 visible / 3 hidden categories

Overlap exists

Input[[0, 30], [5, 10], [15, 20]]

ExpectedFalse

At least one meeting starts too early.

Touching intervals

Input[[7, 10], [2, 4], [4, 7]]

ExpectedTrue

End equals next start is allowed.

Hidden Test Categories

empty interval listsingle intervalunsorted non-overlapping intervals