Compilare: user.cpp: In function ‘int main()’: user.cpp:12:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &m); ^ user.cpp:15:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%lld", &b[i]); ^ user.cpp:53:18: warning: ‘nr’ may be used uninitialized in this function [-Wmaybe-uninitialized] a[acelasi]+=s/nr; ^ user.cpp:53:21: warning: ‘acelasi’ may be used uninitialized in this function [-Wmaybe-uninitialized] a[acelasi]+=s/nr; ^