View Compilation Error

0_0_36670607_2774.cpp: In function 'int main()':
0_0_36670607_2774.cpp:5:3: error: '_int64' was not declared in this scope
   _int64 f[55];
   ^
0_0_36670607_2774.cpp:6:3: error: 'f' was not declared in this scope
   f[1]=1;f[2]=2;f[3]=3;
   ^