View Compilation Error

0_0_26282117_16325.cpp:13:5: error: 'll' does not name a type
     ll ans;
     ^
0_0_26282117_16325.cpp: In member function 'void SAM2::init()':
0_0_26282117_16325.cpp:17:9: error: 'ans' was not declared in this scope
         ans=last=id=0;
         ^
0_0_26282117_16325.cpp: In member function 'void SAM2::Insert(int)':
0_0_26282117_16325.cpp:48:28: error: 'ans' was not declared in this scope
             if(num[np]>=R) ans+=step[np]-step[pre[np]];
                            ^
0_0_26282117_16325.cpp: In function 'int main()':
0_0_26282117_16325.cpp:59:9: error: 'sam' was not declared in this scope
         sam.init();
         ^