Cards Sorting

技巧：

• 有负数，要用数组就统一加一个大的数（更具题目）map可能会影响时间
• 对于本题牢牢利用每一个值不一样，

Polycarp watched TV-show where k jury members one by one rated a participant by adding him a certain number of points (may be negative, i. e. points were subtracted). Initially the participant had some score, and each the marks were one by one added to his score. It is known that the i-th jury member gave ai points.

Polycarp does not remember how many points the participant had before this k marks were given, but he remembers that among the scores announced after each of the k judges rated the participant there were n (n ≤ k) values b1, b2, ..., bn (it is guaranteed that all values bj are distinct). It is possible that Polycarp remembers not all of the scores announced, i. e. n < k. Note that the initial score wasn't announced.

Your task is to determine the number of options for the score the participant could have before the judges rated the participant.

Input
The first line contains two integers k and n (1 ≤ n ≤ k ≤ 2 000) — the number of jury members and the number of scores Polycarp remembers.

The second line contains k integers a1, a2, ..., ak ( - 2 000 ≤ ai ≤ 2 000) — jury's marks in chronological order.

The third line contains n distinct integers b1, b2, ..., bn ( - 4 000 000 ≤ bj ≤ 4 000 000) — the values of points Polycarp remembers. Note that these values are not necessarily given in chronological order.

Output
Print the number of options for the score the participant could have before the judges rated the participant. If Polycarp messes something up and there is no options, print "0" (without quotes).

Sample 1
Inputcopy    Outputcopy
4 1
-5 5 0 20
10
3
Sample 2
Inputcopy    Outputcopy
2 2
-2000 -2000
3998000 4000000
1
Note
The answer for the first example is 3 because initially the participant could have  - 10, 10 or 15 points.

In the second example there is only one correct initial score equaling to 4 002 000.

View problem

#include <bits/stdc++.h>
using namespace std;
#define ri register int
#define M 10005


template  <class G> void read(G &x)
{
    x=0;int f=0;char ch=getchar();
    while(ch<'0'||ch>'9'){f|=ch=='-';ch=getchar();}
    while(ch>='0'&&ch<='9'){x=(x<<1)+(x<<3)+(ch^48);ch=getchar();}
    x=f?-x:x;
    return ;
}

int n,m,md;
int p[M],a[M];
int main(){
    
    read(n);read(m);read(md);
    for(ri i=1;i<=n;i++)
    read(p[i]);
    for(ri j=1;j<=m;j++)
    read(a[j]);
    
    sort(p+1,p+1+n);
    sort(a+1,a+1+m);
    
    long long ans=1e18;
    for(ri i=1;i<=(m-n+1);i++)
    {
        long long tmp=0;
        for(ri j=1;j<=n;j++)
        {
          long long  aa=abs(p[j]-a[i+j-1])+abs(a[i+j-1]-md);tmp=max(tmp,aa);
        }
        ans=min(ans,tmp);
    }
    printf("%lld",ans);
    return 0;
    
    
}

View Code

 

标签：ch,participant,Polycarp,had,Sorting,were,Cards,points
来源： https://www.cnblogs.com/Lamboofhome/p/15973015.html