CF 554A 字符串水题

给出一个字符串，问再加入一个字母，最多能形成多少种字符串

input
a
output
51
input
hi
output
76

 # include <iostream>
 # include <cstdio>
 # include <cstring>
 # include <algorithm>
 # include <cmath>
 # define LL long long
 using namespace std ;

 int main ()
 {
     //freopen("in.txt","r",stdin) ;
     char a[] ;
     while(scanf("%s" , a) != EOF)
     {
         int len =  strlen(a);
         printf("%d\n" , *(len+)-len);
     }

     return  ;
 }