View Compilation Error

0_0_14815886_29993.cpp: In function 'int main()':
0_0_14815886_29993.cpp:7:9: error: '_int128' was not declared in this scope
         _int128 a, b;
         ^
0_0_14815886_29993.cpp:8:14: error: 'a' was not declared in this scope
         cin>>a>>b;
              ^
0_0_14815886_29993.cpp:8:17: error: 'b' was not declared in this scope
         cin>>a>>b;
                 ^