HDU4027 Can you answer these queries? —— 线段树 区间修改

Posted 2020-10-11 h_z_cong

题目链接：https://vjudge.net/problem/HDU-4027

 

A lot of battleships of evil are arranged in a line before the battle. Our commander decides to use our secret weapon to eliminate the battleships. Each of the battleships can be marked a value of endurance. For every attack of our secret weapon, it could decrease the endurance of a consecutive part of battleships by make their endurance to the square root of it original value of endurance. During the series of attack of our secret weapon, the commander wants to evaluate the effect of the weapon, so he asks you for help. 
You are asked to answer the queries that the sum of the endurance of a consecutive part of the battleship line. 

Notice that the square root operation should be rounded down to integer.

InputThe input contains several test cases, terminated by EOF. 
  For each test case, the first line contains a single integer N, denoting there are N battleships of evil in a line. (1 <= N <= 100000) 
  The second line contains N integers Ei, indicating the endurance value of each battleship from the beginning of the line to the end. You can assume that the sum of all endurance value is less than 2 ⁶³. 
  The next line contains an integer M, denoting the number of actions and queries. (1 <= M <= 100000) 
  For the following M lines, each line contains three integers T, X and Y. The T=0 denoting the action of the secret weapon, which will decrease the endurance value of the battleships between the X-th and Y-th battleship, inclusive. The T=1 denoting the query of the commander which ask for the sum of the endurance value of the battleship between X-th and Y-th, inclusive. 
OutputFor each test case, print the case number at the first line. Then print one line for each query. And remember follow a blank line after each test case.Sample Input

10
1 2 3 4 5 6 7 8 9 10
5
0 1 10
1 1 10
1 1 5
0 5 8
1 4 8

Sample Output

Case #1:
19
7
6

 

 

 

代码如下：

 1 #include <iostream>
 2 #include <cstdio>
 3 #include <cstring>
 4 #include <cmath>
 5 #include <algorithm>
 6 #include <vector>
 7 #include <queue>
 8 #include <stack>
 9 #include <map>
10 #include <string>
11 #include <set>
12 using namespace std;
13 typedef long long LL;
14 const double EPS = 1e-8;
15 const int INF = 2e9;
16 const LL LNF = 2e18;
17 const int MAXN = 1e5+10;
18 
19 LL sum[MAXN<<2];
20 
21 void push_up(int u)
22 {
23     sum[u] = sum[u*2] + sum[u*2+1];
24 }
25 
26 void build(int u, int l, int r)
27 {
28     if(l==r)
29     {
30         scanf("%lld", &sum[u]);
31         return;
32     }
33 
34     int mid = (l+r)>>1;
35     build(u*2, l, mid);
36     build(u*2+1, mid+1, r);
37     push_up(u);
38 }
39 
40 void attack(int u, int l, int r, int x, int y)
41 {
42     if(l==r)
43     {
44         sum[u] = (LL)sqrt(sum[u]);
45         return;
46     }
47     if(x<=l && r<=y && sum[u]==1LL*(r-l+1)) return;
48 
49     int mid = (l+r)>>1;
50     if(x<=mid) attack(u*2, l, mid, x, y);
51     if(y>=mid+1) attack(u*2+1, mid+1, r, x, y);
52     push_up(u);
53 }
54 
55 LL query(int u, int l, int r, int x, int y)
56 {
57     if(x<=l && r<=y)
58         return sum[u];
59 
60     LL ret = 0;
61     int mid = (l+r)>>1;
62     if(x<=mid) ret += query(u*2, l, mid, x, y);
63     if(y>=mid+1) ret += query(u*2+1, mid+1, r, x, y);
64     return ret;
65 }
66 
67 int main()
68 {
69     int n, m, kase = 0;
70     while(scanf("%d", &n)!=EOF)
71     {
72         build(1, 1, n);
73         scanf("%d", &m);
74         printf("Case #%d:\n", ++kase);
75         for(int i = 1; i<=m; i++)
76         {
77             LL op, x, y;
78             scanf("%lld%lld%lld", &op, &x, &y);
79             int xx = min(x, y), yy = max(x, y);
80             if(op==0) attack(1, 1, n, xx, yy );
81             else printf("%lld\n", query(1, 1, n, xx, yy) );
82         }
83         printf("\n");
84     }
85 }

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