/in/foo.cc: In function 'int path(int*, int, int, int&)':
/in/foo.cc:8:2: error: 'min_cnt' was not declared in this scope
  min_cnt=INF;
  ^~~~~~~
/in/foo.cc:15:24: error: invalid types 'int[int]' for array subscript
    int a=path(a,n,x-a[i],cnt);
                        ^