bool cmp(node x,node y){
	if(x.s>=0&&y.s>=0)return x.t<y.t;
	else if(x.s<=0&&y.s<=0)return x.t+x.s>y.t+y.s;
	else return x.s>y.s;
}

    if(b)cout<<"+1s\n"<<endl;
		else cout<<"-1s\n"<<endl;