Processing math: 100%

hdu 5280 Senior's Array

题目连接

http://acm.hdu.edu.cn/showproblem.php?pid=5280    

Senior's Array

Description

One day, Xuejiejie gets an array A. Among all non-empty intervals of A, she wants to find the most beautiful one. She defines the beauty as the sum of the interval. The beauty of the interval---[L,R] is calculated by this formula : beauty(L,R)=A[L]+A[L+1]++A[R]. The most beautiful interval is the one with maximum beauty.

But as is known to all, Xuejiejie is used to pursuing perfection. She wants to get a more beautiful interval. So she asks Mini-Sun for help. Mini-Sun is a magician, but he is busy reviewing calculus. So he tells Xuejiejie that he can just help her change one value of the element of A to P . Xuejiejie plans to come to see him in tomorrow morning.

Unluckily, Xuejiejie oversleeps. Now up to you to help her make the decision which one should be changed(You must change one element).

Input

In the first line there is an integer T, indicates the number of test cases.

In each case, the first line contains two integers n and P. n means the number of elements of the array. P means the value Mini-Sun can change to.

The next line contains the original array.

1n1000, 109A[i],P109

Output

For each test case, output one integer which means the most beautiful interval's beauty after your change.

2
3 5
1 -1 2
3 -2
1 -1 2

Sample Output

8
2

数据才1000直接暴力。。

复制代码
 1 #include<algorithm>
 2 #include<iostream>
 3 #include<cstdlib>
 4 #include<cstring>
 5 #include<cstdio>
 6 #include<vector>
 7 #include<map>
 8 using std::max;
 9 using std::cin;
10 using std::cout;
11 using std::endl;
12 using std::find;
13 using std::sort;
14 using std::map;
15 using std::pair;
16 using std::vector;
17 using std::multimap;
18 #define pb(e) push_back(e)
19 #define sz(c) (int)(c).size()
20 #define mp(a, b) make_pair(a, b)
21 #define all(c) (c).begin(), (c).end()
22 #define iter(c) decltype((c).begin())
23 #define cls(arr,val) memset(arr,val,sizeof(arr))
24 #define cpresent(c, e) (find(all(c), (e)) != (c).end())
25 #define rep(i, n) for (int i = 1; i <= (int)(n); i++)
26 #define tr(c, i) for (iter(c) i = (c).begin(); i != (c).end(); ++i)
27 const int N = 1010;
28 const int INF = 0x7fffffff;
29 typedef long long ll;
30 ll p, ans, arr[N], sum[N];
31 int main() {
32 #ifdef LOCAL
33     freopen("in.txt", "r", stdin);
34     freopen("out.txt", "w+", stdout);
35 #endif
36     int t, n;
37     scanf("%d", &t);
38     while (t--) {
39         ans =  -INF;
40         scanf("%d %lld", &n, &p);
41         rep(i, n) scanf("%lld", &arr[i]);
42         rep(i, n) {
43             ll tmp = arr[i]; arr[i] = p;
44             rep(j, n) {
45                 sum[j] = sum[j - 1] > 0 ? sum[j - 1] + arr[j] : arr[j];
46                 ans = max(ans, sum[j]);
47             }
48             arr[i] = tmp;
49         }
50         printf("%lld\n", ans);
51     }
52     return 0;
53 }
View Code
复制代码
posted @   GadyPu  阅读(180)  评论(0编辑  收藏  举报
编辑推荐:
· 智能桌面机器人:用.NET IoT库控制舵机并多方法播放表情
· Linux glibc自带哈希表的用例及性能测试
· 深入理解 Mybatis 分库分表执行原理
· 如何打造一个高并发系统?
· .NET Core GC压缩(compact_phase)底层原理浅谈
阅读排行:
· 手把手教你在本地部署DeepSeek R1,搭建web-ui ,建议收藏!
· 新年开篇:在本地部署DeepSeek大模型实现联网增强的AI应用
· Janus Pro:DeepSeek 开源革新,多模态 AI 的未来
· 互联网不景气了那就玩玩嵌入式吧,用纯.NET开发并制作一个智能桌面机器人(三):用.NET IoT库
· 【非技术】说说2024年我都干了些啥
点击右上角即可分享
微信分享提示