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1 problem completed #1119

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21 changes: 21 additions & 0 deletions combination sum.py
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Original file line number Diff line number Diff line change
@@ -0,0 +1,21 @@
class Solution:
def combinationSum(self, candidates: List[int], target: int) -> List[List[int]]:
self.result=[]
self.helper(candidates,target,0,[])
return self.result
def helper(self,candidates,target,i,path):

#basecase
if target<0 or i==len(candidates):
return
if target==0:
self.result.append(path)
return

#nochoose case
self.helper(candidates,target,i+1,list(path))
#choose case
path.append(candidates[i])
self.helper(candidates,target-candidates[i],i,list(path))