[Level1] 다트 게임 (C++)

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

int CalculateScore(int score, char bonus) {
    if(bonus == 'S')
        return pow(score, 1);
    else if(bonus == 'D')
        return pow(score,2);
    else 
        return pow(score,3);
}

int solution(string dartResult) {
    vector<int> v;
    
    for(int idx = 0; idx < dartResult.length(); idx++) {
        char ele = dartResult.at(idx);
        int num = 0;
        
        if(dartResult.substr(idx, 2) == "10") 
            v.push_back(CalculateScore(stoi(dartResult.substr(idx, 2)), dartResult.at(idx+2)));
        
        else if('0' <= ele && ele <= '9')
            v.push_back(CalculateScore(ele-'0', dartResult.at(++idx)));
            
        else if (ele == '*') {
            int vSize = v.size();
            if(vSize == 1) v.at(0) = v.at(0) * 2;
            else {
                v.at(vSize-1) *= 2;
                v.at(vSize-2) *= 2;
            }
	     }
         
        else if (ele == '#') {
            v.back() = v.back() * -1;
        }
    }
    
    int answer = 0;
    for(auto ele : v)
        answer += ele;
    return answer;
}