@Ew_Cors 我推下去了啊，

if(tag[i]){
		sgt[i]+=tag[i];
		pushdown(lc[i<<1],rc[i<<1],i<<1,tag[i]/(rc[i]-lc[i]+1));
		pushdown(lc[(i<<1)|1],rc[(i<<1)|1],(i<<1)|1,tag[i]/(rc[i]-lc[i]+1));
		tag[i]=0;
	}