/in/foo.cc: In function 'int main()':
/in/foo.cc:12:22: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'short int*' [-Wformat=]
   scanf("%d",&tree[i]);
                      ^
/in/foo.cc:15:18: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[21]' [-Wformat=]
   scanf("%s",&com);
                  ^