View Compilation Error

1_868_4536_911.cpp: In function 'int main()':
1_868_4536_911.cpp:6:2: error: 'll' was not declared in this scope
  ll num;
  ^
1_868_4536_911.cpp:13:22: error: 'num' was not declared in this scope
    scanf("%lld.%d", &num, &dec);
                      ^