C++ 亲朋字符串生成器：高效代码实现

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

string transform(string s) {
    string result = "";
    for (int i = 0; i < s.length() - 1; i++) {
        result += (s[i] + s[i+1]) % 64 + 64;
    }
    result += (s[s.length()-1] + s[0]) % 64 + 64;
    return result;
}

int main() {
    string s;
    cin >> s;
    cout << transform(s) << endl;
    return 0;
}