プログラマSummer/Winter Coding(~218)-小数を作成

問題の説明

せいげんじょうけん

に答える

def solution(nums):
    answer = 0
    for num1 in range(len(nums)-2):
        for num2 in range(num1+1, len(nums)-1):
            for num3 in range(num2+1, len(nums)):
                isPrime = True
                sum = nums[num1] + nums[num2] + nums[num3]
                if sum % 2 == 0:
                    continue
                for i in range(int(sum/2)-1 if int(sum/2) % 2 == 0 else int(sum/2), 2, -2):
                    if sum % i == 0:
                        isPrime = False
                        break
                if isPrime:
                    answer += 1

    return answer

他人の解答

from itertools import combinations
# 콤비네이션 함수로 3개를 뽑아온다 a에
def solution(nums):
    answer = 0
    for a in combinations(nums, 3):
        sumNum = sum(a)  # 다 더한걸 가지고
        isPrime = True
        for i in range(2, sumNum): # 하나씩 그냥 다 검사함
            if sumNum % i == 0:
                isPrime = False
                break
        if isPrime:
            answer += 1
    return answer