Compilare: user.cpp: In function ‘void read()’: user.cpp:15:36: warning: format ‘%d’ expects argument of type ‘int*’, but argument 5 has type ‘long long int*’ [-Wformat=] scanf("%lf%lf%lf%d",&a,&b,&c,&n); ^ user.cpp: In function ‘void solve()’: user.cpp:30:20: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long long int’ [-Wformat=] printf("%d",sol); ^ user.cpp: In function ‘void read()’: user.cpp:12:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("iopds.in","r",stdin); ^ user.cpp:13:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("iopds.out","w",stdout); ^ user.cpp:15:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf%lf%lf%d",&a,&b,&c,&n); ^ user.cpp:17:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf",&v[i]); ^