View Compilation Error

0_0_36366119_27506.cpp: In function 'int main()':
0_0_36366119_27506.cpp:44:4: error: 'a' was not declared in this scope
    a[i]=cnt-ss[i-1];
    ^
0_0_36366119_27506.cpp:48:34: error: 'a' was not declared in this scope
   for(int i=1;i<=maxn;i++) cout<<a[i]<<endl; 
                                  ^
0_0_36366119_27506.cpp:52:18: error: 'a' was not declared in this scope
             if(i>a[f]) f++;
                  ^