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Re: TL 了 。。。求指教

Posted by Aesthetic at 2018-11-27 21:33:57 on Problem 3468
In Reply To: TL 了 。。。求指教 Posted by:150140 at 2018-10-17 22:02:03
> #include<cstdio>
> #include<cstring>
> typedef long long ll;
> const int maxn=262144;
> ll sum[maxn],add[maxn];
> int node[maxn/2];
> void pushup(int rt)
> {
>     sum[rt]=sum[rt<<1]+sum[rt<<1|1];
> }
> void bulid(int l,int r,int rt)
> {
>     if(l==r)
>     {
>         sum[rt]=(ll)node[l];
>         return ;
>     }
>     int m=(l+r)>>1;
>     bulid(l,m,rt<<1);
>     bulid(m+1,r,rt<<1|1);
>     pushup(rt);
> }
> void pushdown(int rt,int ln,int rn)
> {
>     if(add[rt])
>     {
>         add[rt<<1]+=add[rt];
>         add[rt<<1|1]+=add[rt];
>         sum[rt<<1]+=add[rt]*(ll)ln;
>         sum[rt<<1|1]+=add[rt]*(ll)rn;
>         add[rt]=0;
>     }
> }
> void update(int L,int R,ll c,int l,int r,int rt)
> {
>     if(l==r)
>     {
>         sum[rt]+=(ll)c*(r-l+1);
>         add[rt]+=c;
>         return ;
>     }
>     int m=(l+r)>>1;
>     pushdown(rt,m-l+1,r-m);
>     if(L<=m)
>         update(L,R,c,l,m,rt<<1);
>     if(R>m)
>         update(L,R,c,m+1,r,rt<<1|1);
>     pushup(rt);
> }
> ll query(int L,int R,int l,int r,int rt)
> {
>     if(L<=l && R>=r)
>         return sum[rt];
>     int m=(l+r)>>1;
>     pushdown(rt,m-l+1,r-m);
>     ll ans=0;
>     if(L<=m)
>         ans+=query(L,R,l,m,rt<<1);
>     if(R>m)
>         ans+=query(L,R,m+1,r,rt<<1|1);
>     return ans;
> }
> int main()
> {
>     int n,q,x,y;
>     char ch;
>     ll z;
>     scanf("%d%d",&n,&q);
>     for(int i=1;i<=n;i++)
>         scanf("%d",&node[i]);
>     bulid(1,n,1);
>     for(int i=0;i<q;i++)
>     {
>         getchar();
>         scanf("%c",&ch);
>         if(ch=='Q')
>         {
>             scanf("%d%d",&x,&y);
>             printf("%lld\n",query(x,y,1,n,1));
>         }
>         else if(ch=='C')
>         {
>             scanf("%d%d%lld",&x,&y,&z);
>             update(x,y,z,1,n,1);
>         }
>     }
>     return 0;
> }

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