三数之和

def solve():
    def threeSum(____):
        nums.sort()
        result = []
        n = len(____)
        for i in range(____):
            if i > ____ and nums[i] == nums[i-____]:
                continue
            left, right = i+____, n-____
            while left < right:
                total = nums[i] + nums[left] + nums[right]
                if total < ____:
                    left += ____
                elif total > ____:
                    right -= ____
                else:
                    result.append(____)
                    while left < right and nums[left] == nums[left+____]:
                        left += ____
                    while left < right and nums[right] == nums[right-____]:
                        right -= ____
                    left += ____
                    right -= ____
        return result
    print(threeSum(____))