View Compilation Error

0_0_31961129_14398.cpp: In function 'int main()':
0_0_31961129_14398.cpp:7:3: error: 'Int' was not declared in this scope
   Int   d[51] = {0, 3, 6, 6};
   ^
0_0_31961129_14398.cpp:9:9: error: 'd' was not declared in this scope
         d[i] = d[i-1] + 2*d[i-2]; 
         ^
0_0_31961129_14398.cpp:11:27: error: 'd' was not declared in this scope
         printf("%I64d\n", d[i]);
                           ^