문제

풀이

#include <string>
#include <vector>
using namespace std;

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