View Compilation Error

0_0_31943151_15122.cpp: In function 'int main()':
0_0_31943151_15122.cpp:9:3: error: 'int64' was not declared in this scope
   int64 a[31];
   ^
0_0_31943151_15122.cpp:10:3: error: 'a' was not declared in this scope
   a[0]=a[1]=0;a[2]=1,a[3]=2;
   ^
0_0_31943151_15122.cpp:13:9: error: expected ';' before 'sum1'
   int64 sum1,sum2;
         ^
0_0_31943151_15122.cpp:14:3: error: 'sum1' was not declared in this scope
   sum1=sum2=1;
   ^
0_0_31943151_15122.cpp:14:8: error: 'sum2' was not declared in this scope
   sum1=sum2=1;
        ^