View Compilation Error

0_0_23367438_27010.cpp:5:1: error: 'int64' does not name a type
 int64 dp[33005]={0};
 ^
0_0_23367438_27010.cpp: In function 'int main()':
0_0_23367438_27010.cpp:10:2: error: 'dp' was not declared in this scope
  dp[0] = 1;
  ^