我就用list
ㄚ我也不知道可不可以
反正就过了ㄚ 对ㄚ==
class CustomStack:
def __init__(self, maxSize: int):
self.l = []
self.maxSize = maxSize
def push(self, x: int) -> None:
if len(self.l) < self.maxSize:
self.l.append(x)
def pop(self) -> int:
if len(self.l) > 0:
return self.l.pop()
else:
return -1
def increment(self, k: int, val: int) -> None:
for i in range(min(k,len(self.l))):
self.l[i] += val