/in/foo.cc: In function 'int main()':
/in/foo.cc:9:41: warning: array subscript has type 'char' [-Wchar-subscripts]
    9 |         for(int i=1;i<=n;i++) cin>>lift[i];
      |                                         ^
/in/foo.cc:12:17: warning: array subscript has type 'char' [-Wchar-subscripts]
   12 |         isvisit[s]=true;
      |                 ^
/in/foo.cc:20:43: warning: array subscript has type 'char' [-Wchar-subscripts]
   20 |                 int next_loc=now_loc+lift[now_loc];
      |                                           ^~~~~~~
/in/foo.cc:21:42: warning: array subscript has type 'char' [-Wchar-subscripts]
   21 |                 if(next_loc<=n&&!isvisit[next_loc]){
      |                                          ^~~~~~~~
/in/foo.cc:25:34: warning: array subscript has type 'char' [-Wchar-subscripts]
   25 |                 next_loc-=2*lift[now_loc];
      |                                  ^~~~~~~
/in/foo.cc:26:42: warning: array subscript has type 'char' [-Wchar-subscripts]
   26 |                 if(next_loc>=1&&!isvisit[next_loc]){
      |                                          ^~~~~~~~