题解 | #简单密码#

#include <bits/stdc++.h>

using namespace std;

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