Compilare: user.cpp: In function ‘int main()’: user.cpp:5:17: warning: variable ‘k’ set but not used [-Wunused-but-set-variable] long long x,y,n,k,p,i,c1,c2,m,q,sol; ^ user.cpp:3:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] {freopen ("proc.in","r",stdin); ^ user.cpp:4:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("proc.out","w",stdout); ^ user.cpp:6:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld%lld",&n,&q,&p); ^