/in/foo.cc: In function 'void Build_SA()':
/in/foo.cc:32:36: warning: array subscript has type 'char' [-Wchar-subscripts]
  for (int i=0;i<n;++i) wt[x[i]=r[i]]++;
                                    ^
/in/foo.cc:34:39: warning: array subscript has type 'char' [-Wchar-subscripts]
  for (int i=n-1;i>=0;--i) SA[--wt[x[i]]]=i;
                                       ^
/in/foo.cc:34:40: warning: array subscript has type 'char' [-Wchar-subscripts]
  for (int i=n-1;i>=0;--i) SA[--wt[x[i]]]=i;
                                        ^
/in/foo.cc:43:34: warning: array subscript has type 'char' [-Wchar-subscripts]
   for (int i=0;i<n;++i) wt[x[y[i]]]--;
                                  ^
/in/foo.cc:43:35: warning: array subscript has type 'char' [-Wchar-subscripts]
   for (int i=0;i<n;++i) wt[x[y[i]]]--;
                                   ^
/in/foo.cc:45:39: warning: array subscript has type 'char' [-Wchar-subscripts]
   for (int i=n-1;i>=0;--i) wt[--x[y[i]]]=y[i];
                                       ^
/in/foo.cc:45:40: warning: array subscript has type 'char' [-Wchar-subscripts]
   for (int i=n-1;i>=0;--i) wt[--x[y[i]]]=y[i];
                                        ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:57:6: warning: unused variable 'm' [-Wunused-variable]
  int m=130;
      ^