题解

#include<iostream>
#include<cstdio>
#include<cstring>
using namespace std;
int main(){
	char a[1000];
	gets(a);
	int len = strlen(a);
	int n=1;
	for(int i=0;i<len;i++){
		if(a[i]>='A' and a[i]<='Z'-n){
			a[i]=a[i]+n;
		}
		else if(a[i]>='a' and a[i]<='z'-n){
			a[i]=a[i]+n;
		}
		else if(a[i]>'Z'-n and a[i]<='Z'){
			a[i]=a[i]-(26-n);
		}
		else if(a[i]>'z'-n and a[i]<='z'){
			a[i]=a[i]-(26-n);
		}
	}
	cout<<a;
    return 0;
}