zoukankan      html  css  js  c++  java
  • Round #417 C. Sagheer and Nubian Market(Div.2)

    On his trip to Luxor and Aswan, Sagheer went to a Nubian market to buy some souvenirs for his friends and relatives. The market has some strange rules. It contains n different items numbered from 1 to n. The i-th item has base cost ai Egyptian pounds. If Sagheer buys k items with indices x1, x2, ..., xk, then the cost of item xj is axj + xj·k for 1 ≤ j ≤ k. In other words, the cost of an item is equal to its base cost in addition to its index multiplied by the factor k.

    Sagheer wants to buy as many souvenirs as possible without paying more than S Egyptian pounds. Note that he cannot buy a souvenir more than once. If there are many ways to maximize the number of souvenirs, he will choose the way that will minimize the total cost. Can you help him with this task?

    Input

    The first line contains two integers n and S (1 ≤ n ≤ 105 and 1 ≤ S ≤ 109) — the number of souvenirs in the market and Sagheer's budget.

    The second line contains n space-separated integers a1, a2, ..., an (1 ≤ ai ≤ 105) — the base costs of the souvenirs.

    Output

    On a single line, print two integers kT — the maximum number of souvenirs Sagheer can buy and the minimum total cost to buy these k souvenirs.

    Examples
    input
    3 11
    2 3 5
    output
    2 11
    input
    4 100
    1 2 5 6
    output
    4 54
    input
    1 7
    7
    output
    0 0
    Note

    In the first example, he cannot take the three items because they will cost him [5, 9, 14] with total cost 28. If he decides to take only two items, then the costs will be [4, 7, 11]. So he can afford the first and second items.

    In the second example, he can buy all items as they will cost him [5, 10, 17, 22].

    In the third example, there is only one souvenir in the market which will cost him 8 pounds, so he cannot buy it.

     1 #include <stdio.h>
     2 #include <iostream>
     3 #include <algorithm>
     4 #define maxn 100010
     5 #define ll long long
     6 using namespace std;
     7 ll a[maxn];
     8 ll b[maxn];
     9 
    10 int main(){
    11     ll n,m;
    12     scanf("%I64d%I64d",&n,&m);
    13     for(int i=1;i<=n;i++)
    14         scanf("%I64d",&a[i]);
    15     ll l,mid,r;
    16     l=1;
    17     r=n;
    18     ll res=0,sum=0,ans;
    19     while(l<=r){
    20         mid=(l+r)>>1;
    21         for(int i=1;i<=n;i++)
    22             b[i]=a[i]+i*mid;
    23         sort(b+1,b+n+1);
    24         ans=0;
    25         for(int i=1;i<=mid;i++)
    26             ans+=b[i];
    27         if(ans<=m){
    28             l=mid+1;
    29             sum=ans;
    30             res=mid;
    31         }
    32         else r=mid-1;
    33     }
    34     printf("%I64d %I64d",res, sum);
    35     return 0;
    36 }
  • 相关阅读:
    git commit之后,想撤销commit
    centOS7下ifconfig提示command not found
    图数据库 — neo4j (二)
    XQuery的 value() 方法、 exist() 方法 和 nodes() 方法
    SQL存储过程-新增和修改,参数Xml数据类型
    项目管理软件之易度1.5,禅道2.0,redmine1.2(附redmine1.2的安装)
    测试性能工具
    存储过程
    人生三支点:健康,职业,自由
    生活网站推荐
  • 原文地址:https://www.cnblogs.com/z-712/p/7307816.html
Copyright © 2011-2022 走看看