我认为第一种的pushup已经足够了，因为当tree[tree[u].ls].max_num==tree[tree[u].rs].max_num时候ls的id（救济粮编号）总是小于rs的，可以直接赋值成ls，但在第二个点过不了，求大佬解惑

这是tps95的pushup：

void pushup(int u){
if(tree[tree[u].ls].max_num>=tree[tree[u].rs].max_num){
		tree[u].max_num=tree[tree[u].ls].max_num;
		tree[u].max_id=tree[tree[u].ls].max_id;
	}else{
		tree[u].max_num=tree[tree[u].rs].max_num;
		tree[u].max_id=tree[tree[u].rs].max_id;
	}

这是tps100的pushup：

void pushup(int u){
if(tree[tree[u].ls].max_num>tree[tree[u].rs].max_num){
		tree[u].max_num=tree[tree[u].ls].max_num;
		tree[u].max_id=tree[tree[u].ls].max_id;
	}else if(tree[tree[u].ls].max_num<tree[tree[u].rs].max_num){
		tree[u].max_num=tree[tree[u].rs].max_num;
		tree[u].max_id=tree[tree[u].rs].max_id;
	}else if(tree[tree[u].ls].max_id<tree[tree[u].rs].max_id){
		tree[u].max_num=tree[tree[u].ls].max_num;
		tree[u].max_id=tree[tree[u].ls].max_id;
	}else{
		tree[u].max_num=tree[tree[u].rs].max_num;
		tree[u].max_id=tree[tree[u].rs].max_id;
	} 
}