68935번 3진법 뒤집기

코딩테스트 연습 - Level 1 - 3진법 뒤집기

https://programmers.co.kr/learn/courses/30/lessons/68935

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

int solution(int n) {
    int answer = 0, tri=1;
    vector <int> num;
    
    while(n)
    {
        num.push_back(n%3);
        n/=3;
    }   
    
    for(int i=num.size()-1;i>=0;i--)
    {
        answer+=(num[i]*tri);
        tri*=3;
    }
    return answer;
}