Compilare: user.cpp: In function ‘int main()’: user.cpp:11:60: warning: unused variable ‘c’ [-Wunused-variable] int n,v[30001]={0},b[200]={0},i,d,a[10000]={0},j,x,p=0,c,m,y,ok; ^ user.cpp:12:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&m,&n); ^ user.cpp:20:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&y); ^