Compilare: user.cpp: In function ‘void cit(int&)’: user.cpp:16:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,1000,fila); ^ user.cpp:27:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,1000,fila); ^ user.cpp: In function ‘int main()’: user.cpp:71:24: warning: iteration 32000u invokes undefined behavior [-Waggressive-loop-optimizations] lg[i]=lg[i/2]+1; ^ user.cpp:70:5: note: containing loop for(int i=2; i<=MAX*2; i++) ^ user.cpp:104:32: warning: ‘u2’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<maxi<<" "<<u1<<" "<<u2; ^ user.cpp:104:21: warning: ‘u1’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<maxi<<" "<<u1<<" "<<u2; ^ user.cpp:83:15: warning: ‘rad’ may be used uninitialized in this function [-Wmaybe-uninitialized] dfs(rad,1); ^