bzoj 1034 泡泡堂BNB

题目链接:http://www.lydsy.com/JudgeOnline/problem.php?id=1034

题解:
  很明显的贪心,读过田忌赛马的典故就很容易能想出来,分成三种情况讨论:

  <1>如果A队实力最强的选手比B队实力最强的选手强,就比一场;

  <2>如果A队实力最弱的选手比B队实力最弱的选手强,就比一场;

  <3>如果上述情况都不行,就直接用A队实力最弱的选手和B队实力最强的选手比一场;

  先把浙江队当成A队,对手当成B队,算出最大得分;

  再反过来算出最小得分即可

 1 #include<cstdio>
 2 #include<algorithm>
 3 using namespace std;
 4 #define MAXN 100010
 5 int n,a[MAXN],b[MAXN],ans;
 6 int main()
 7 {
 8     scanf("%d",&n);
 9     for(int i=1;i<=n;i++)scanf("%d",&a[i]);
10     for(int i=1;i<=n;i++)scanf("%d",&b[i]);
11     sort(a+1,a+1+n);
12     sort(b+1,b+1+n); 
13     int l1=1,l2=1,r1=n,r2=n;
14     while(l1<=r1&&l2<=r2)
15     {
16         if(a[l1]>b[l2])
17         {
18             ans+=2;
19             l1++;
20             l2++;
21         }
22         else if(a[r1]>b[r2])
23         {
24             ans+=2;
25             r1--;
26             r2--;
27         }
28         else
29         {
30             if(a[l1]==b[r2])ans++;
31             l1++;
32             r2--;
33         }
34     }
35     printf("%d ",ans);
36     ans=0;
37     l1=1;
38     l2=1;
39     r1=n;
40     r2=n;
41     while(l1<=r1&&l2<=r2)
42     {
43         if(b[l1]>a[l2])
44         {
45             ans+=2;
46             l1++;
47             l2++;
48         }
49         else if(b[r1]>a[r2])
50         {
51             ans+=2;
52             r1--;
53             r2--;
54         }
55         else
56         {
57             if(b[l1]==a[r2])ans++;
58             l1++;
59             r2--;
60         }
61     }
62     printf("%d\n",2*n-ans);
63     return 0;
64 }
posted @ 2016-10-26 19:02  xqmmcqs  阅读(185)  评论(0编辑  收藏  举报