Compilare: user.cpp: In function ‘int main()’: user.cpp:23:20: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[1000]’ [-Wformat=] scanf("%s" , &B); ^ user.cpp: In function ‘void trans(long long int*, long long int)’: user.cpp:169:27: warning: argument to ‘sizeof’ in ‘void* memset(void*, int, size_t)’ call is the same expression as the destination; did you mean to dereference it? [-Wsizeof-pointer-memaccess] memset (a , 0 , sizeof(a)); ^ user.cpp: In function ‘int main()’: user.cpp:21:56: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("infinitepatternmatching.in" , "r" , stdin); ^ user.cpp:23:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s" , &B); ^ user.cpp: In function ‘void verif2(long long int, long long int)’: user.cpp:147:31: warning: ‘dif’ may be used uninitialized in this function [-Wmaybe-uninitialized] ans = min (ans , calc(nr) + dif - n); ^