HDU 4893 线段树裸题Wow! Such Sequence!

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我是靠谱客的博主长情音响，最近开发中收集的这篇文章主要介绍HDU 4893 线段树裸题Wow! Such Sequence!，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

Wow! Such Sequence!

Time Limit: 10000/5000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)
Total Submission(s): 2512 Accepted Submission(s): 751

Problem Description

Recently, Doge got a funny birthday present from his new friend, Protein Tiger from St. Beeze College. No, not cactuses. It's a mysterious blackbox.

After some research, Doge found that the box is maintaining a sequence an of n numbers internally, initially all numbers are zero, and there are THREE "operations":

1.Add d to the k-th number of the sequence.
2.Query the sum of ai where l ≤ i ≤ r.
3.Change ai to the nearest Fibonacci number, where l ≤ i ≤ r.
4.Play sound "Chee-rio!", a bit useless.

Let F ₀ = 1,F ₁ = 1,Fibonacci number Fn is defined as F _n = F _{n - 1} + F _{n - 2} for n ≥ 2.

Nearest Fibonacci number of number x means the smallest Fn where |F _n - x| is also smallest.

Doge doesn't believe the machine could respond each request in less than 10ms. Help Doge figure out the reason.

Input

Input contains several test cases, please process till EOF.
For each test case, there will be one line containing two integers n, m.
Next m lines, each line indicates a query:

1 k d - "add"
2 l r - "query sum"
3 l r - "change to nearest Fibonacci"

1 ≤ n ≤ 100000, 1 ≤ m ≤ 100000, |d| < 2 ³¹, all queries will be valid.

Output

For each Type 2 ("query sum") operation, output one line containing an integer represent the answer of this query.

Sample Input

Sample Output

Author

Fudan University

Source

2014 Multi-University Training Contest 3

题意不说了，很简单的线段树题目了，就是打标记改点求段，修改段时由于极限次数不多，直接暴力更新到点，

好久没写线段树了，错了好多次，写的好傻逼。

代码：

/* ***********************************************
Author :rabbit
Created Time :2014/8/4 14:58:15
File Name :11.cpp
************************************************ */
#pragma comment(linker, "/STACK:102400000,102400000")
#include <stdio.h>
#include <iostream>
#include <algorithm>
#include <sstream>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <string>
#include <time.h>
#include <math.h>
#include <queue>
#include <stack>
#include <set>
#include <map>
using namespace std;
#define INF 0x3f3f3f3f
#define eps 1e-8
#define pi acos(-1.0)
typedef long long ll;
ll fib[100];
struct node{
    ll l,r;
    ll sum,flag;
}a[800300];
ll m,n;
void pushup(ll t){
    if(a[t].l==a[t].r)return;
    a[t].sum=a[2*t].sum+a[2*t+1].sum;
    a[t].flag=a[2*t].flag&a[2*t+1].flag;
}
void build(ll t,ll l,ll r){
//    cout<<"hhh "<<l<<" "<<r<<endl;
    a[t].l=l;
    a[t].r=r;
    a[t].sum=a[t].flag=0;
    if(l==r)return;
    ll mid=(l+r)/2;
    build(2*t,l,mid);
    build(2*t+1,mid+1,r);
    pushup(t);
}
void update1(ll t,ll p,ll val){
    if(a[t].l==a[t].r){
        a[t].sum+=val;
        a[t].flag=0;
        return;
    }
    ll mid=(a[t].l+a[t].r)/2;
    if(p<=mid)update1(2*t,p,val);
    else update1(2*t+1,p,val);
    pushup(t);
}
ll Find(ll x){
    if(x <= 1)return 1;
    int l = 1, r = 80, id = 80;
    while(l <= r){
    int mid = l+r>>1;
        if(fib[mid] > x)    id = mid, r = mid-1;
        else    l = mid+1;
    }
    if(x-fib[id-1] <= fib[id]-x)    return fib[id-1];
    return fib[id];
}

void update2(ll t,ll l,ll r){
    if(a[t].flag)return;
    if(a[t].l==a[t].r){
        a[t].sum=Find(a[t].sum);
        a[t].flag=1;
        //cout<<"ddd "<<l<<" "<<r<<" "<<a[t].sum<<endl;
        return;
    }
    ll mid=(a[t].l+a[t].r)/2;
    if(l<=mid)update2(2*t,l,r);
    if(r>mid)update2(2*t+1,l,r);
    pushup(t);
}

ll getsum(ll t,ll l,ll r){
    if(a[t].l>=l&&a[t].r<=r)return a[t].sum;
    ll mid=(a[t].l+a[t].r)/2;
    ll ans=0;
    if(l<=mid)ans+=getsum(2*t,l,r);
    if(r> mid) ans+=getsum(2*t+1,l,r);
    return ans;
}
int main()
{
    // freopen("data.in","r",stdin);
    // freopen("data.out","w",stdout);
     fib[0]=1;fib[1]=1;
     for(ll i=2;i<=90;i++)fib[i]=fib[i-1]+fib[i-2];
     while(~scanf("%I64d%I64d",&n,&m)){
        // cout<<"ddd "<<endl;
         build(1,1,n);
         //cout<<"ppp "<<endl;
         while(m--){
             ll l,r,op;
             scanf("%I64d%I64d%I64d",&op,&l,&r);
             if(op==1){
                 update1(1,l,r);
            //     cout<<"han 1"<<endl;
             }
              if(op==2){
                 printf("%I64dn",getsum(1,l,r));
                // cout<<"han 2"<<endl;
             }
              if(op==3){
                 update2(1,l,r);
            //     cout<<"han 3"<<endl;
             }
         }
     }
     return 0;
}
/*
5 10 
2 1 5 
3 1 5 
2 1 5 
1 1 10 
2 1 5 
3 1 5 
2 1 5 
 
4 5 
1 1 3 
2 1 2 
3 2 3 
1 2 1 
2 1 4 
*/