View Compilation Error

0_0_29367352_31706.cpp: In function 'int main()':
0_0_29367352_31706.cpp:53:3: error: 'In128' was not declared in this scope
   In128 x=gcd(ans,n);
   ^
0_0_29367352_31706.cpp:54:8: error: 'x' was not declared in this scope
   ans/=x;
        ^