BOJ - 1182 - 부분수열의 합

import sys

def DFS(S, dataArray, count, index, dataSum):
    if dataSum == S:
        count[0] += 1

    for start in range(index + 1, len(dataArray)):
        DFS(S, dataArray, count, start, dataSum + dataArray[start])

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

    count = [0]
    for start in range (len(dataArray)):
        DFS(int(S), dataArray, count, start, dataArray[start])

    print(count[0])
solution()

https://www.acmicpc.net/problem/1182