View Compilation Error

0_0_38806268_25486.cpp: In function 'void solve()':
0_0_38806268_25486.cpp:9:5: error: 'int128' was not declared in this scope
    9 |     int128 ans=0;
      |     ^~~~~~
0_0_38806268_25486.cpp:19:9: error: 'ans' was not declared in this scope; did you mean 'abs'?
   19 |         ans+=sum[i-1]*v[i];
      |         ^~~
      |         abs
0_0_38806268_25486.cpp:21:11: error: 'ans' was not declared in this scope; did you mean 'abs'?
   21 |     cout<<ans<<endl;
      |           ^~~
      |           abs