解法一、陣列

✅ 完整代碼

評分結果(參考) ： AC (2ms, 344KB)

#include <bits/stdc++.h>
using namespace std;

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int a, b, s;
    cin >> a >> b;
    s = (a*2+b)%3;
    
    vector<string> v = {"普通", "吉", "大吉"};
    cout << v[s];
    
    return 0;
}

解法二、switch case

✅ 完整代碼

#include <bits/stdc++.h>
using namespace std;

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int a, b, s;
    cin >> a >> b;
    s = (a*2+b)%3;
    
    switch(s){
        case 0: cout << "普通"; break;
        case 1: cout << "吉"; break;
        case 2: cout << "大吉"; break;
    }
    
    return 0;
}