char em[10][20];
int n = 0, m = 0;
...
while (gets(em[n++]) && em[n-1][0]);
--n;
m = (int) strlen(em[0]);
...

this code doesn't pass test 3 and gets WA, but if i insert this line
if (m != strlen(em[1])) while(true);
it gets Time Limit Exceeded !!! check it

Edited by author 16.01.2009 23:18

Lengths of lines may differ, because the spaces at the end of lines are omitted.