Compilare: user.cpp: In function ‘int main()’: user.cpp:35:17: warning: unused variable ‘j’ [-Wunused-variable] long long i,j,nod=0,ti,d,x; ^ user.cpp:36:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&n,&m); ^ user.cpp:41:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lld %lld",&ti,&d); ^