题目传送门

测试数据都是对的呀，求助各位大佬

#include<bits/stdc++.h>
using namespace std;
int main()
{
	string s;
	getline(cin,s);
	int len=s.length();
	for(int i=0;i<len;i++)
	{
		s[i]+=3;
		if(s[i]>='z'||(s[i]<=93&&s[i]>'Z'))
			s[i]-=32;
	}
	cout<<s<<endl;
	reverse(s.begin(),s.end());
	cout<<s<<endl;
	for(int i=0;i<len;i++){
	
		if(s[i]>='A'&&s[i]<='Z')
			s[i]+=32;
		else if(s[i]>='a'&&s[i]<='z')
			s[i]-=32;
	}
	cout<<s<<endl;
	return 0;
}
//哪里错了？