Compilare: user.cpp: In function ‘void rmq(int)’: user.cpp:46:9: warning: unused variable ‘el’ [-Wunused-variable] int el=lg[n]; ^ user.cpp: In function ‘int lca(int, int)’: user.cpp:57:33: warning: unused variable ‘i’ [-Wunused-variable] int n1=first[a],n2=first[b],i,j,x; ^ user.cpp:57:35: warning: unused variable ‘j’ [-Wunused-variable] int n1=first[a],n2=first[b],i,j,x; ^ user.cpp:57:37: warning: unused variable ‘x’ [-Wunused-variable] int n1=first[a],n2=first[b],i,j,x; ^ user.cpp: In function ‘int main()’: user.cpp:67:15: warning: unused variable ‘j’ [-Wunused-variable] int n,m,i,j,a,b; ^ user.cpp: In function ‘void citire(int&)’: user.cpp:20:27: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] {fread(buff,1,DIM,fil);poz=0;} ^ user.cpp:27:27: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] {fread(buff,1,DIM,fil);poz=0;} ^