Compilare: main.cpp: In function 'void lazy(int, int, int)': main.cpp:31:17: warning: pointer to a function used in arithmetic [-Wpointer-arith] if(lazy[node] == 0) return; ^ main.cpp: In function 'int main()': main.cpp:67:9: warning: unused variable 'i' [-Wunused-variable] int i,j,type,x,a,b,beg,ending,maxi; ^ main.cpp:67:11: warning: unused variable 'j' [-Wunused-variable] int i,j,type,x,a,b,beg,ending,maxi; ^ main.cpp:70:36: 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 , 4000000 , fin); ^