View Compilation Error

0_0_26068247_10040.cpp: In function 'int main()':
0_0_26068247_10040.cpp:11:6: error: 'i' was not declared in this scope
  for(i=1,f[0]=1;i<63;++i)f[i]=f[i-1]+(1ll<<(i-1));
      ^
0_0_26068247_10040.cpp:17:10: error: too few arguments to function '__int128 HA(long long int, long long int)'
    O(HA(t)-HA(s-1));
          ^
0_0_26068247_10040.cpp:7:10: note: declared here
 __int128 HA(long long,long long);
          ^
0_0_26068247_10040.cpp:17:18: error: too few arguments to function '__int128 HA(long long int, long long int)'
    O(HA(t)-HA(s-1));
                  ^
0_0_26068247_10040.cpp:7:10: note: declared here
 __int128 HA(long long,long long);
          ^
0_0_26068247_10040.cpp: In function '__int128 HAHA(long long int)':
0_0_26068247_10040.cpp:35:11: error: 'n' was not declared in this scope
  while(x<=n)++ans,x+=lowbit(x);
           ^