def subset_sum(arr,sum,res):
    if sum==0:
        return True
    if sum<0:
        return False
    if len(arr)==0 and sum!=0:
        return False
    arr.pop(0)
    if len(arr)>0:
        res.append(arr[0])
        select= subset_sum(arr,sum-arr[0],res)
        reject= subset_sum(arr,sum,res)
        return select or reject

arr = [3,4,5,2]
sum = 14
res=[]
print(subset_sum(arr,sum,res))