View Compilation Error

0_0_39305778_20836.cpp: In function 'int main()':
0_0_39305778_20836.cpp:11:9: error: '_int64' was not declared in this scope
   11 |         _int64 dp[51];
      |         ^~~~~~
0_0_39305778_20836.cpp:12:9: error: 'dp' was not declared in this scope
   12 |         dp[0] = 0;
      |         ^~