last-visited-integers

Last visited integers

Problem link

Solutions

Solution.py

# https://leetcode.com/problems/last-visited-integers/

class Solution:
    def lastVisitedIntegers(self, words: List[str]) -> List[int]:
        seen, ret, n = [], [], 0
        for s in words:
            if s == 'prev':
                ret.append(seen[-1-n] if n < len(seen) else -1)
                n += 1
            else:
                n = 0
                seen. append(int(s))
        return ret

Tags

• Simple implementation