4350: GESP C++ 四级 3幸运数202306

#include <iostream>
using namespace std;
// 奇数位要做的数字变换
int trans(int t) {
    if (t == 0)
        return 0; 
    return (t * 7 - 1) % 9 + 1;
}
// 判断是否为幸运数
bool judge(long long x) {
    int sum = 0;
    for (int d = 1; x > 0; d++, x /= 10) {
        int t = (int)(x % 10);
        if (d % 2 == 0)
            sum += t;
        else
            sum += trans(t);
    }
    return (sum % 8 == 0);
}
int main() {
    int N = 0;
    cin >> N;
    for (int n = 0; n < N; n++) {
        long long x = 0;
        cin >> x;
        if (judge(x))
            cout << "T" << endl;
        else
            cout << "F" << endl;
    }
    return 0;
}