/in/foo.cc: In function 'void deal()':
/in/foo.cc:8:26: warning: unused variable 'maxlen' [-Wunused-variable]
     int maxright=0,pos=0,maxlen=0;
                          ^~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:27:18: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
     scanf("%d",&n);
                  ^