被后5个点干报废了

TsH_GD @ 2022-11-19 07:35:12

by xingke233 @ 2022-11-19 08:05:02

@God_Dream

应该return -INF

int check(int p,int l,int r){
        if(tr[p].l>r||tr[p].r<l) return -INF;

        if(tr[p].l>=l&&tr[p].r<=r){
            return tr[p].maxx;
        }

        push_down(p);

        int s=-INF;
        s=max(s,check(p<<1,l,r));
        s=max(s,check(p<<1|1,l,r));
        return s;
    }