Each of the remaining lines contains one word, which consists of maximally 50 small letters of the English alphabet
struct cstring 
{
    char s[55]; 
    friend bool operator<(cstring a, cstring b) 
    { 
        return strcmp(a.s, b.s) < 0; 
    } 
}dictionary[51001]；
这样就RE
把s[55]改成s[105]就AC了