View Compilation Error

0_0_29468131_27294.cpp: In function 'int main()':
0_0_29468131_27294.cpp:7:8: error: 'int64' was not declared in this scope
        int64 n,j;
        ^
0_0_29468131_27294.cpp:8:27: error: 'n' was not declared in this scope
      while(scanf("%I64d",&n)&&n)
                           ^
0_0_29468131_27294.cpp:15:10: error: 'j' was not declared in this scope
          j=a[n-1]*(2010-n);
          ^