View Compilation Error

0_0_22386695_1588.cpp: In function 'int main()':
0_0_22386695_1588.cpp:11:9: error: 'll' was not declared in this scope
         ll ans = 0;
         ^
0_0_22386695_1588.cpp:20:24: error: 'ans' was not declared in this scope
             if(t == k) ans += 1ll*(len-r+1);
                        ^
0_0_22386695_1588.cpp:25:15: error: 'ans' was not declared in this scope
         cout<<ans<<endl;
               ^