View Compilation Error

0_0_19713923_12910.cpp: In function 'int main()':
0_0_19713923_12910.cpp:5:11: error: '_int64' was not declared in this scope
     int n;_int64 ls[39];
           ^
0_0_19713923_12910.cpp:6:5: error: 'ls' was not declared in this scope
     ls[1]=0;ls[2]=1;
     ^