/in/foo.cc: In member function 'int PolyListNode::Num(int)':
/in/foo.cc:26:4: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
    if(a[i].index!=0)
    ^~
/in/foo.cc:29:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
     num=num+a[i].coef*temp;
     ^~~