View Compilation Error

0_0_18684757_1250.cpp: In function 'int main()':
0_0_18684757_1250.cpp:20:9: error: 'buf' was not declared in this scope
         buf = 0;
         ^
0_0_18684757_1250.cpp:28:16: error: 'ha' was not declared in this scope
             if(ha == Get(i-1, i+m-1)) i += m-1, ans++;
                ^