/in/foo.cc: In function 'int main()':
/in/foo.cc:11:14: warning: array subscript has type 'char' [-Wchar-subscripts]
 if( (!f[mi[i]] && !f2[yuan[i]]) )f[mi[i]]=yuan[i],f2[yuan[i]]=mi[i],cnt++;
              ^
/in/foo.cc:11:30: warning: array subscript has type 'char' [-Wchar-subscripts]
 if( (!f[mi[i]] && !f2[yuan[i]]) )f[mi[i]]=yuan[i],f2[yuan[i]]=mi[i],cnt++;
                              ^
/in/foo.cc:11:41: warning: array subscript has type 'char' [-Wchar-subscripts]
 if( (!f[mi[i]] && !f2[yuan[i]]) )f[mi[i]]=yuan[i],f2[yuan[i]]=mi[i],cnt++;
                                         ^
/in/foo.cc:11:61: warning: array subscript has type 'char' [-Wchar-subscripts]
 if( (!f[mi[i]] && !f2[yuan[i]]) )f[mi[i]]=yuan[i],f2[yuan[i]]=mi[i],cnt++;
                                                             ^
/in/foo.cc:12:17: warning: array subscript has type 'char' [-Wchar-subscripts]
 else if( f[mi[i]]==yuan[i] && f2[yuan[i]]) continue;
                 ^
/in/foo.cc:12:41: warning: array subscript has type 'char' [-Wchar-subscripts]
 else if( f[mi[i]]==yuan[i] && f2[yuan[i]]) continue;
                                         ^
/in/foo.cc:17:42: warning: array subscript has type 'char' [-Wchar-subscripts]
 for(int i=0;i<len3;i++) goal[i]=f[goal[i]];
                                          ^