2009 Mock DWITE by A.J.: Problem 5

Traffic Lights

Every day, Brenda is faced with the monumental task of getting to work by car. Brenda lives in a city containing C north-south roads and R east-west roads. Every north-south road intersects every east-west road exactly once. All north-south roads are parallel to each other and perpendicular to all east-west roads (which are themselves all mutually parallel as well). Conveniently, the westernmost north-south road is called 1st Avenue, the next westernmost 2nd Avenue, and so on; the northernmost east-west road is called 1st Street, the next northermost 2nd Street, and so on.

Two intersections are considered adjacent if it is possible to move from one intersection to another along a road without passing through any other intersection on the way. It takes Brenda exactly X minutes to move between two adjacent intersections, where X is constant.

Each intersection has a traffic light. The traffic light at the intersection of ith Street and jth Avenue spends gij minutes green in the north-south direction, then immediately switches to being red for rij in the north-south direction, then repeats this cycle indefinitely. The color in the east-west direction is always opposite to the color in the north-south direction at any instant in time. Brenda cannot leave an intersection unless the light is green in the direction of travel at the time of departure from that intersection.

Brenda's apartment is at one intersection, and her place of work is at another intersection. Brenda departs from her home at time zero, cannot leave the city, and obviously must travel along the roads. She knows that, at her time of departure, all lights in the city have just switched to green in the north-south direction. Help her determine the earliest time at which she can possibly arrive at work.


There will be five cases given one after another in the input.
The first line of each case contains three space-separated integers: R, C (1 ≤ R,C ≤ 40), and X (1 ≤ X ≤ 5), as described above.
The next line contains two space-separated integers: Rh and Ch (1 ≤ RhR, 1 ≤ ChC), indicating that Brenda's home is located at Rhth Street and Chth Avenue.
The next line contains two space-separated integers: Rw and Cw (1 ≤ RwR, 1 ≤ CwC), indicating that Brenda's place of work is located at Rwth Street and Cwth Avenue.
A block of R lines follows, each containing C space-separated integers. The jth integer in the ith line in this block gives gij (1 ≤ gij ≤ 5).
A block of R lines follows, each containing C space-separated integers. The jth integer in the ith line in this block gives rij (1 ≤ rij ≤ 5).


For each case given in input, in the order given, output one line containing one integer: the minimum amount of time, in seconds, it takes for Brenda to get to work.

Sample Input (only two cases shown)

1 2 1
1 2
1 2
2 3 
4 2 
2 2 3
2 1
2 2
5 3 
5 4 
1 5 
2 5 

Sample Output



In the first case, Brenda's home and place of work are on the same intersection, so we assume that it takes no time at all for her to move from one to the other.
In the second case, Brenda waits for five minutes for the light at her initial intersection to turn green in the east-west direction, and three minutes for her to travel east one block. That totals eight minutes.

All Submissions
Best Solutions

Point Value: 15 (partial)
Time Limit: 2.00s
Memory Limit: 16M
Added: Sep 26, 2009
Author: bbi5291

Languages Allowed:

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It's quiet in here...