Compilare: user.cpp: In function ‘int main()’: user.cpp:15:17: warning: unused variable ‘logn’ [-Wunused-variable] int i,j,a,b,logn=0,x=1; ^ user.cpp:15:24: warning: unused variable ‘x’ [-Wunused-variable] int i,j,a,b,logn=0,x=1; ^ user.cpp: In function ‘int query(int, int)’: user.cpp:45:9: warning: unused variable ‘i’ [-Wunused-variable] int i,nr,L,l; ^ user.cpp: In function ‘int main()’: user.cpp:16:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&n,&m); ^ user.cpp:19:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&t[i]); ^ user.cpp:31:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&a,&b); ^