/in/foo.cc: In function 'int main()':
/in/foo.cc:24:44: warning: right operand of comma operator has no effect [-Wunused-value]
   tree[i].left=-1,tree[i].right=-1,tree[i].father,tree[i].mark;
                                    ~~~~~~~~^~~~~~
/in/foo.cc:24:59: warning: right operand of comma operator has no effect [-Wunused-value]
   tree[i].left=-1,tree[i].right=-1,tree[i].father,tree[i].mark;
                                                   ~~~~~~~~^~~~