MOBIVINA - MobiZone vs VinaGone

KTuan and AnhDQ, CEOs of two telecommunication corporations MobiZone and VinaGone have signed a contract to use their network in common. N people have accepted to try this new service. The ith people accepts to pay Mi to use MobiZone's service or Vi to use VinaGone's one; and any two people ith and jth accept to pay Cij in common whether they use different services (the network cost).


Find a way of choosing networks for N people satisfying the sum of total cost is minimum.


- The first line contains number N.
- The second line contains N number(s) Mi.
- The third line contains N number(s) Vi.
- The last N line(s), each of them contains N number(s) Cij (Cij = Cji).


- Contains the minimum total cost.


1 1 10
10 10 1
0 0 1
0 0 1
1 1 0



- N ≤ 250.
- The remaining numbers of Input do not exceed 1000.

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treenipples: 2021-01-12 04:36:49

Another similar problem: LightOJ 1361 - Component Placement

kesh4281: 2020-04-02 12:11:29

The last line of the statement means if two guys i and j use different services then they pay Cij (=Cji) once.

যোবায়ের: 2013-03-27 15:32:11

@Alex Abbas, I think the possible explanation is, you assign person1 with Mobi, person2 with Mobi and person3 with Vina. Then they need to pay 1 + 1 + 1 individually. Also, person1 and person3 are using different network, so they pay C[1][3] more, same as person2 and person3, C[2][3] more. totalling 3 + 1 + 1 = 5

Last edit: 2013-09-19 05:40:15
Alex Abbas: 2013-02-26 15:28:06

I don't understand whether we need to connect all services to all people or just one service can u explain the input/output sample please...

Ajey Golsangi: 2012-08-30 16:56:31

The problem statement is unclear. Please rectify the grammar in the problem statement.

Added by:AnhDQ
Time limit:0.100s-1s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
Languages:All except: ERL JS-RHINO NODEJS PERL6 VB.NET
Resource:Mr Tuan Khuc Anh - NTU (Singapore)