From 74ac8c39c1248afd5d99604b7a20e27c67625679 Mon Sep 17 00:00:00 2001 From: Guang-Hou <87743934+Guang-Hou@users.noreply.github.com> Date: Fri, 25 Mar 2022 15:49:48 -0400 Subject: [PATCH] =?UTF-8?q?Update=200134.=E5=8A=A0=E6=B2=B9=E7=AB=99.md?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- problems/0134.加油站.md | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/problems/0134.加油站.md b/problems/0134.加油站.md index ca95af67..f73ab9f4 100644 --- a/problems/0134.加油站.md +++ b/problems/0134.加油站.md @@ -239,6 +239,30 @@ class Solution { ### Python ```python +# 解法1 +class Solution: + def canCompleteCircuit(self, gas: List[int], cost: List[int]) -> int: + n = len(gas) + cur_sum = 0 + min_sum = float('inf') + + for i in range(n): + cur_sum += gas[i] - cost[i] + min_sum = min(min_sum, cur_sum) + + if cur_sum < 0: return -1 + if min_sum >= 0: return 0 + + for j in range(n - 1, 0, -1): + min_sum += gas[j] - cost[j] + if min_sum >= 0: + return j + + return -1 +``` + +```python +# 解法2 class Solution: def canCompleteCircuit(self, gas: List[int], cost: List[int]) -> int: start = 0