Compilare: user.cpp: In function ‘int solve1()’: user.cpp:21:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<=strlen(C+1);i++) ^ user.cpp: In function ‘int smax(int, int)’: user.cpp:47:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ In file included from /usr/include/string.h:642:0, from /usr/include/c++/4.8/cstring:42, from user.cpp:3: In function ‘void* memmove(void*, const void*, size_t)’, inlined from ‘void read()’ at user.cpp:17:29: /usr/include/i386-linux-gnu/bits/string3.h:58:72: warning: call to void* __builtin___memmove_chk(void*, const void*, unsigned int, unsigned int) will always overflow destination buffer [enabled by default] return __builtin___memmove_chk (__dest, __src, __len, __bos0 (__dest)); ^