题解 | #简单密码#

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

int main() {
    string str;
    cin >> str;
    
    string result;
    for(char c : str) {      
        
        if(c>='a'&&c<='c') c = '2';
        else if(c>='d'&&c<='f') c = '3';
        else if(c>='g'&&c<='i') c = '4';
        else if(c>='j'&&c<='l') c = '5';
        else if(c>='m'&&c<='o') c = '6';
        else if(c>='p'&&c<='s') c = '7';
        else if(c>='t'&&c<='v') c = '8';
        else if(c>='w'&&c<='z') c = '9';
        
        if(c>='A') {
            if(c<'Z') c = c + 32 + 1;
            else if(c=='Z') c = 'a';
        }
        
        result += c;
    }
    
    cout << result << endl;
    
    return 0;
}