View Compilation Error

0_0_21019949_12627.cpp: In function 'int main()':
0_0_21019949_12627.cpp:4:2: error: 'int64' was not declared in this scope
  int64 dp[1005];
  ^
0_0_21019949_12627.cpp:7:2: error: 'dp' was not declared in this scope
  dp[1]=0;
  ^