Compilare: user.cpp: In function ‘void calc(int*, int, int, int, int)’: user.cpp:15:26: 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(v2, 0, sizeof v2); ^ user.cpp: In function ‘int main()’: user.cpp:38:13: warning: unused variable ‘p’ [-Wunused-variable] int n, i, p[MAXN]; ^ user.cpp:39:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.cpp:41:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &v[i]); ^