Skip to main content

Arrays and strings

Two Pointers​

Sliding Window​

Template

def fn(arr):
    left = ans = curr = 0

    for right in range(len(arr)):
        # do logic here to add arr[right] to curr

        while WINDOW_CONDITION_BROKEN:
            # remove arr[left] from curr
            left += 1

        # update ans
    
    return ans

Prefix Sum​

Permutations​

Combinations​