View Compilation Error

0_0_36762403_13083.cpp:3:1: error: 'longlong' does not name a type
 longlong t,a,c;
 ^
0_0_36762403_13083.cpp: In function 'int main()':
0_0_36762403_13083.cpp:6:7: error: 't' was not declared in this scope
  cin>>t;
       ^
0_0_36762403_13083.cpp:9:8: error: 'a' was not declared in this scope
   cin>>a;
        ^
0_0_36762403_13083.cpp:11:3: error: 'c' was not declared in this scope
   c=0;
   ^