BOJ - 2473 - 세 용액

import sys

def solution():
    N = int(sys.stdin.readline())
    arr = list(map(int, sys.stdin.readline().split()))
    arr.sort()

    _INF = 1e11
    ret = [0] * 3

    for i in range(N-2):
        if i > 0 and arr[i] == arr[i-1]: continue

        left = i + 1
        right = N -1

        while left < right:
            temp = arr[i] + arr[left] + arr[right]
            if abs(temp) < abs(_INF):
                ret[0] = arr[i]
                ret[1] = arr[left]
                ret[2] = arr[right]
                _INF = temp

            if temp < 0: left += 1
            elif temp > 0: right -= 1
            else:
                print(arr[i], arr[left], arr[right])
                return
    for k in range(3): print(ret[k], end=' ')
solution()

https://www.acmicpc.net/problem/2473