View Compilation Error

0_0_29368408_26811.cpp: In function 'int main()':
0_0_29368408_26811.cpp:58:8: error: 'ans' was not declared in this scope
   kk=n,ans=0;
        ^
0_0_29368408_26811.cpp:59:14: error: 'k' was not declared in this scope
   while(last[k]){
              ^