From 2b3a0890f9c8539425ce30f8954f85cb65c1eda9 Mon Sep 17 00:00:00 2001 From: choiminji Date: Sat, 19 Sep 2026 23:58:11 +0900 Subject: [PATCH] 0919 --- .../284.py" | 20 +++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 "leetcode3/\354\265\234\353\257\274\354\247\200/284.py" diff --git "a/leetcode3/\354\265\234\353\257\274\354\247\200/284.py" "b/leetcode3/\354\265\234\353\257\274\354\247\200/284.py" new file mode 100644 index 000000000..6c0fcb443 --- /dev/null +++ "b/leetcode3/\354\265\234\353\257\274\354\247\200/284.py" @@ -0,0 +1,20 @@ +class PeekingIterator: + def __init__(self, iterator): + self.iterator = iterator + self.peek_value = iterator.next() if iterator.hasNext() else None + + def peek(self): + return self.peek_value + + def next(self): + current = self.peek_value + + if self.iterator.hasNext(): + self.peek_value = self.iterator.next() + else: + self.peek_value = None + + return current + + def hasNext(self): + return self.peek_value is not None \ No newline at end of file