#include <bits/stdc++.h>   int main(void) {     int i, j, k, m, n, max_length, length;     char string[101];     for (n = 0, scanf( %s , string); string[n]; n++)       ;     for (m = 1, max_length = 0; m < n; m++) {       for (i = m - 1; i >= 0; i--) {         for (j = i, k = m, length = 0; k && string[j] == string[k];              j--, k--, length++)           ;         if (max_length < length) {           max_length = length;         }       }     }     printf( %d , max_length);     return 0;   }   