Compilare: user.cpp: In function ‘void solve()’: user.cpp:45:27: warning: left operand of comma operator has no effect [-Wunused-value] for (long int i=2; i*i<=mirror_N, N>1; i++) ^ user.cpp: In function ‘void read()’: user.cpp:63:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &nr_teste); ^ user.cpp:66:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%ld", &X, &Y); ^