View Compilation Error

0_0_35908916_14138.cpp:3:3: error: 'int64' does not name a type
   int64 num[55];
   ^
0_0_35908916_14138.cpp: In function 'int main()':
0_0_35908916_14138.cpp:6:2: error: 'num' was not declared in this scope
  num[1]=1;num[2]=2;
  ^