CF 586B 起点到终点的最短路和次短路之和

起点是右下角  终点是左上角

每次数据都是两行的点  输入n 表示有n列

接下来来的2行是 列与列之间的距离

最后一行是  行之间的距离

枚举就行

 

Sample test(s)

input

4
1 2 3
3 2 1
3 2 2 3

output

12

input

3
1 2
3 3
2 1 3

output

11

input

2
1
1
1 1

output

4

 # include <iostream>
 # include <cstdio>
 # include <cstring>
 # include <algorithm>
 # include <string>
 # include <cmath>
 # include <queue>
 # define LL long long
 using namespace std ;

 const int INF = 0x3f3f3f3f ;

 int a[][] ;
 int b[] ;

 int main()
 {
     int n;
     while(scanf("%d",&n) != EOF)
     {
        int i , j ;
        int sum =  ;
        for (i =  ; i <   ; i++)
           for (j =  ; j < n- ; j++)
            scanf("%d" , &a[i][j]) ;
        for (i =  ; i < n  ; i++)
           scanf("%d" , &b[i]) ;
        int ans[] = {INF , INF , INF} ;
        for (i =  ; i < n-  ; i++)
        {
            sum += a[][i] ;
        }
        sum += b[] ;
        ans[] = sum ;
        sort(ans , ans+) ;
        for (i =  ; i < n-  ; i++)
        {
            sum = sum - a[][i] + a[][i] ;
            sum = sum - b[i] + b[i+] ;
            ans[] = sum ;
            sort(ans , ans+) ;
        }
        printf("%d\n" , ans[] + ans[]) ;

     }
     return ;
 }