题解 | #简单密码#

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

int main() {
    string s1,s2,s3;
    while(getline(cin,s1)){
    if(s1=="START")
    {
        getline(cin,s2);  //读取完开始 ，就开始读取一行密文
        int len=s2.length();
        for(int i=0;i<len;i++)
        {
            if(s2[i]>='A'&&s2[i]<='E') s2[i]=s2[i]+21;
            else if(s2[i]>'E'&&s2[i]<='Z')s2[i]=s2[i]-5;
            else continue;
        }
        for(int i=0;i<len;i++) cout<<s2[i];
        cout<<endl;
       //cout<<s2<<endl;
    }
    else if(s1=="ENDOFINPUT") break;
    }
}