```
def combinationSum4(self, nums, target):
temp = nums[:]
temp.sort()
i = 0
j = len(temp) - 1
sum = 0
while i < j:
sum = temp[i] + temp[j]
if sum > target:
j -= 1
elif sum < target:
i += 1
else:
if temp[i] == temp[j]:
index = nums.index(temp[i])
index += 1
return(nums.index(temp[i]), nums[index:].index(temp[j]) + index)
return (nums.index(temp[i]), nums.index(temp[j]))
```