hdu 3954 线段树 (标记)

Level up

Time Limit: 10000/3000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 3973 Accepted Submission(s): 1104

Problem Description

Level up is the task of all online games. It's very boooooooooring. There is only level up in those games, except level up.
In a online game, there are N heroes numbered id from 1 to N, each begins with level 1 and 0 Experience. They need to kill monsters to get Exp and level up.

There are many waves of monsters, each wave, the heroes with id from li to ri will come to kill monsters and those hero with level k will get ei*k Exp. If one hero's Exp reach Needk then the hero level up to level k immediately.
After some waves, I will query the maximum Exp from li to ri.
Now giving the information of each wave and Needk, please tell me the answer of my query.

Input

The first line is a number T(1<=T<=30), represents the number of case. The next T blocks follow each indicates a case.
The first line of each case contains three integers N(1<=N<=10000), K(2<=K<=10) and QW(1<=QW<=10000)each represent hero number, the MAX level and querys/waves number.
Then a line with K -1 integers, Need2, Need3...Needk.(1 <= Need2 < Need3 < ... < Needk <= 10000).
Then QW lines follow, each line start with 'W' contains three integers li ri ei (1<=li<=ri<=N , 1<=ei<=10000); each line start with 'Q' contains two integers li ri (1<=li<=ri<=N).

Output

For each case, output the number of case in first line.(as shown in the sample output)
For each query, output the maximum Exp from li to ri.
Output a black line after each case.

Sample Input

Sample Output

Case 1:
3
6

Case 2:
9
18
25

/*
hdu 3954 线段树 (标记)

给你n个人，然后打怪升级，如果当前人的等级为x，怪的经验为k，则这个人
可以得到x*k的经验。
然后k-1个数表示2-k即所需要的经验，假设你有leve[k]的经验，便能马上
升到k级。(最开始以为是k-1到k级要leve[k]的经验 TAT)

最开始只是记录的经验最大值MAX和add标记，然后更新最大值。
但是每次都要查找等级大小,感觉应该是TLE,但却一直WR.感觉很费解

然后借鉴了下别人的思路
新增了一个need和grade,即区间中升级所差经验的最小值,如果添加的经验小于
这个need,则更新这些标记即可.否则就找到那些需要升级的进行升级。

hhh-2016-03-22 22:48:41
*/
#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;
#define lson  (i<<1)
#define rson  ((i<<1)|1)
typedef long long ll;
int n,qw;
int k;
const int maxn = 10010;
struct node
{
    int l,r,grade;
    int Max;
    int add,need;
    int mid()
    {
        return (l+r)>>1;
    }
} tree[maxn*10];
int leve[15];


void push_up(int i)
{
    tree[i].Max = max(tree[lson].Max,tree[rson].Max);
    tree[i].grade = max(tree[lson].grade,tree[rson].grade);
    tree[i].need = min(tree[lson].need,tree[rson].need);
}

void fin_level(int cur)
{
    for(int i = tree[cur].grade; i < k; i++)
    {
        if(tree[cur].Max >= leve[i])
            tree[cur].grade = i+1;
    }
}

void build(int l,int r,int i)
{
    tree[i].l = l;
    tree[i].r = r;
    tree[i].Max = tree[i].add = 0;
    tree[i].need = leve[1];
    tree[i].grade = 1;
    if(l == r)
    {
        return ;
    }
    int mid = tree[i].mid();
    build(l,mid,lson);
    build(mid+1,r,rson);
    push_up(i);
}

void push_down(int i)
{
    if(tree[i].add)
    {
        tree[lson].add += tree[i].add;
        tree[rson].add += tree[i].add;
        tree[lson].Max += tree[i].add*tree[lson].grade;
        tree[rson].Max += tree[i].add*tree[rson].grade;
        tree[lson].need -= tree[i].add;
        tree[rson].need -= tree[i].add;
        tree[i].add = 0;
    }
}

void Insert(int i,int l,int r,int val)
{
    push_down(i);
    int mid = tree[i].mid();
    if(tree[i].l == tree[i].r)
    {
        tree[i].Max += val*tree[i].grade;
        fin_level(i);
        tree[i].need = (leve[tree[i].grade]-tree[i].Max)/(tree[i].grade)+
        ((leve[tree[i].grade]-tree[i].Max)%(tree[i].grade)!=0);
        return ;
    }
    else if(tree[i].l >= l && tree[i].r <= r)
    {
        if(tree[i].need > val)
        {
            tree[i].add += val;
            tree[i].need -= val;
            tree[i].Max += (ll)val*tree[i].grade;
            return ;
        }
        push_down(i);
        if(l <= mid)Insert(lson,l,r,val);
        if(r > mid)Insert(rson,l,r,val);
        push_up(i);
        return;
    }
    if(l <= mid)Insert(lson,l,r,val);
    if(r > mid)Insert(rson,l,r,val);
    push_up(i);
}

int query(int i,int l,int r)
{
    if(tree[i].l >= l && tree[i].r <= r)
    {
        return tree[i].Max;
    }
    push_down(i);
    int ma = 0;
    int mid = tree[i].mid();

    if(l <= mid)
        ma =max(ma,query(lson,l,r));
    if(r > mid)
        ma =max(ma,query(rson,l,r));
    return ma;
}

int main()
{
    int T,cas = 1;
    scanf("%d",&T);
    while(T--)
    {
        scanf("%d%d%d",&n,&k,&qw);
        for(int i = 1; i < k; i++)
            scanf("%d",&leve[i]);
        build(1,n,1);
        leve[0] = 0;

        leve[k] = 1<<30;
        char ch[4];
        int l,r;
        int val;
        printf("Case %d:
",cas++);
        for(int i = 1; i <=qw; i++)
        {
            scanf("%s",ch);
            if(ch[0] == 'Q')
            {
                scanf("%d%d",&l,&r);
                ll ma = query(1,l,r);
                printf("%I64d
",ma);
            }
            if(ch[0] == 'W')
            {
                scanf("%d%d%d",&l,&r,&val);
                Insert(1,l,r,val);
            }
        }
        printf("
");
    }
    return 0;
}