Compilare: user.c: In function ‘main’: user.c:33:8: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(s1, MAXN + 2, in); ^ user.c:36:8: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(s2, MAXN + 2, in); ^ user.c:18:30: warning: ‘lt’ may be used uninitialized in this function [-Wmaybe-uninitialized] rc = lc - 1 + min2(r[i - lt], rt - i + 1); ^ user.c:12:10: note: ‘lt’ was declared here int i, lt, rt = -1, lc, rc; ^ user.c:18:30: warning: ‘lt’ may be used uninitialized in this function [-Wmaybe-uninitialized] rc = lc - 1 + min2(r[i - lt], rt - i + 1); ^ user.c:12:10: note: ‘lt’ was declared here int i, lt, rt = -1, lc, rc; ^ In file included from /usr/include/stdio.h:934:0, from user.c:1: In function ‘fgets’, inlined from ‘main’ at user.c:33:8: /usr/include/i386-linux-gnu/bits/stdio2.h:253:2: warning: call to ‘__fgets_chk_warn’ declared with attribute warning: fgets called with bigger size than length of destination buffer [enabled by default] return __fgets_chk_warn (__s, __bos (__s), __n, __stream); ^ In function ‘fgets’, inlined from ‘main’ at user.c:36:8: /usr/include/i386-linux-gnu/bits/stdio2.h:253:2: warning: call to ‘__fgets_chk_warn’ declared with attribute warning: fgets called with bigger size than length of destination buffer [enabled by default] return __fgets_chk_warn (__s, __bos (__s), __n, __stream); ^