博客
关于我
2019ICPC 沈阳重现 L-Flowers(二分)
阅读量:390 次
发布时间:2019-03-05

本文共 1012 字,大约阅读时间需要 3 分钟。

7-7 L-Flowers

Recently Jack becomes much more romantic. He would like to prepare several bunches of flowers.

Each bunch of flowers must have exactly M flowers. As Jack does not want to be boring, he hopes that flowers in the same bunch are all different species. Now there are N species of flowers in the flower shop, and the number of the i-th species of flower is a​i. Now Jack would like to know how many bunches of flowers he can prepare at most.

(Flowers are used to propose.)

Sample Input
1
5 3
1 1 1 2 1

Sample Output

2
思路:二分答案,看一下共x朵花,每朵花m个不同的花组成能不能满足就行了。

#include
using namespace std;typedef long long ll;const int maxn=3e5+1; int T,n;ll k,a[maxn];bool check(ll x){ ll sum=0; for(int i=1;i<=n;++i) sum+=min(a[i],x); return sum>=x*k;}int main(){ scanf("%d",&T); while(T--) { ll sum=0; scanf("%d %lld",&n,&k); for(int i=1;i<=n;++i) scanf("%lld",&a[i]),sum+=a[i]; ll l=0,r=sum,mid; while(l<=r) { mid=(l+r)>>1; if(check(mid)) l=mid+1; else r=mid-1; } printf("%lld\n",r); } }

转载地址:http://thewz.baihongyu.com/

你可能感兴趣的文章
Mysql 常见错误
查看>>
mysql 常见问题
查看>>
MYSQL 幻读(Phantom Problem)不可重复读
查看>>
mysql 往字段后面加字符串
查看>>
mysql 快速自增假数据, 新增假数据,mysql自增假数据
查看>>
Mysql 批量修改四种方式效率对比(一)
查看>>
Mysql 报错 Field 'id' doesn't have a default value
查看>>
MySQL 报错:Duplicate entry 'xxx' for key 'UNIQ_XXXX'
查看>>
Mysql 拼接多个字段作为查询条件查询方法
查看>>
mysql 排序id_mysql如何按特定id排序
查看>>
Mysql 提示:Communication link failure
查看>>
mysql 插入是否成功_PDO mysql:如何知道插入是否成功
查看>>
Mysql 数据库InnoDB存储引擎中主要组件的刷新清理条件:脏页、RedoLog重做日志、Insert Buffer或ChangeBuffer、Undo Log
查看>>
mysql 数据库中 count(*),count(1),count(列名)区别和效率问题
查看>>
mysql 数据库备份及ibdata1的瘦身
查看>>
MySQL 数据库备份种类以及常用备份工具汇总
查看>>
mysql 数据库存储引擎怎么选择?快来看看性能测试吧
查看>>
MySQL 数据库操作指南:学习如何使用 Python 进行增删改查操作
查看>>
MySQL 数据库的高可用性分析
查看>>
MySQL 数据库设计总结
查看>>