标签:lis app pre ida bin end nat sort 目标
给定一个数组?candidates?和一个目标数?target?,找出?candidates?中所有可以使数字和为?target?的组合。
candidates?中的每个数字在每个组合中只能使用一次。
说明:
所有数字(包括目标数)都是正整数。
解集不能包含重复的组合。?
示例?1:
输入: candidates =?[10,1,2,7,6,1,5], target =?8,
所求解集为:
[
[1, 7],
[1, 2, 5],
[2, 6],
[1, 1, 6]
]
示例?2:
输入: candidates =?[2,5,2,1,2], target =?5,
所求解集为:
[
? [1,2,2],
? [5]
]
class Solution:
def combinationSum2(self, candidates: List[int], target: int) -> List[List[int]]:
ans = []
cur = []
candidates = sorted(candidates)
self.dfs(candidates,target,ans,cur,0)
return ans
def dfs(self,candidates,target,ans,cur,s):
if 0 == target:
ans.append(cur[::])
return
for i in range(s,len(candidates)):
#print(‘ans:‘,ans,‘cur:‘,cur,‘s:‘,s)
num = candidates[i]
if num > target:
break
else:
if i>s and candidates[i] == candidates[i-1]:
continue
cur.append(num)
self.dfs(candidates,target-num,ans,cur,i+1)
cur.pop()
标签:lis app pre ida bin end nat sort 目标
原文地址:https://www.cnblogs.com/sandy-t/p/13285354.html