TSP(个人模版)

O（n^2）TSP：

 1 #include<stdio.h>
 2 #include<string.h>
 3 #include<algorithm>
 4 #include<iostream>
 5 using namespace std;
 6 #define INF 0x3f3f3f3f
 7 int n,d[1005],dp[1005][1005];
 8 int dis(int a,int b)
 9 {
10     int tmp=abs(d[a]-d[b]);
11     return min(tmp,360-tmp);
12 }
13 int TSP_Dp()
14 {
15     dp[2][1]=dis(1,2);
16     for (int i = 3; i <= n + 1; i++) {
17         dp[i][i-1] = INF;
18 
19         for (int j = 1; j < i-1; j++) {
20             dp[i][i-1] = min(dp[i][i-1], dp[i-1][j] + dis(i, j));
21             dp[i][j] = dp[i-1][j] + dis(i, i-1);
22         }
23     }
24 
25     int ans = INF;
26     for (int i = 1; i <= n; i++)
27         ans = min(ans, dp[n+1][i] + dis(n+1, i));
28     return ans;
29 }
30 int main()
31 {
32     int t;
33     scanf("%d",&t);
34     while(t--)
35     {
36         d[1]=0;
37         int ans=0;
38         scanf("%d",&n);
39         for(int i=2;i<=n+1;i++)
40         {
41             int a;
42             scanf("%d%d",&a,&d[i]);
43             if(i==n+1)ans+=a*800;
44             ans+=10;
45         }
46         ans+=TSP_Dp();
47         printf("%d\n",ans);
48     }
49 }

 

posted @ 2017-03-16 23:07  Angel_Kitty  阅读(355)  评论(2)  编辑  收藏  举报