제출한 코드

import sys

def two_sum(nums, target):
    seen = {}
    for i, num in enumerate(nums):
        need = target - num
        if need in seen:
            return [seen[need], i]
        seen[num] = i
    return [-1, -1]

# Read input
n = int(input())
nums = list(map(int, input().split()))
target = int(input())

result = two_sum(nums, target)
print(result[0], result[1])