View Compilation Error

0_0_22361184_29318.cpp: In function 'int main()':
0_0_22361184_29318.cpp:16:13: error: 'ans' was not declared in this scope
             ans+=maxn;cnt++;
             ^
0_0_22361184_29318.cpp:19:9: error: 'ans' was not declared in this scope
         ans+=a-1;
         ^