[프로그래머스/C++] 등차수열의 특정한 항만 더하기

문제

두 정수 a, d와 길이가 n인 boolean 배열 included가 주어집니다. 첫째항이 a, 공차가 d인 등차수열에서 included[i]가 i + 1항을 의미할 때, 이 등차수열의 1항부터 n항까지 included가 true인 항들만 더한 값을 return 하는 solution 함수를 작성해 주세요.

 

솔루션

#include <string>
#include <vector>

using namespace std;

int solution(int a, int d, vector<bool> included) {
    int answer = 0;
    int n = a;
    for(int i = 0; i < included.size(); i++){
        if(included[i])
            answer += n;
        n += d;
    }
    return answer;
}

 

https://school.programmers.co.kr/learn/courses/30/lessons/181931