Solve an assignment problem online

Fill in the cost matrix of an assignment problem and click on 'Solve'. The optimal assignment will be determined and a step by step explanation of the hungarian algorithm will be given.

Fill in the cost matrix (random cost matrix):

Size: 3x3 4x4 5x5 6x6 7x7 8x8 9x9 10x10

Don't show the steps of the Hungarian algorithm
Maximize the total cost

This is the original cost matrix:

1	5	3
4	2	8
7	9	3

Subtract row minima

We subtract the row minimum from each row:

0	4	2	(-1)
2	0	6	(-2)
4	6	0	(-3)

Subtract column minima

Because each column contains a zero, subtracting column minima has no effect.

Cover all zeros with a minimum number of lines

There are 3 lines required to cover all zeros:

0	4	2	x
2	0	6	x
4	6	0	x

The optimal assignment

Because there are 3 lines required, the zeros cover an optimal assignment:

0	4	2
2	0	6
4	6	0

This corresponds to the following optimal assignment in the original cost matrix:

1	5	3
4	2	8
7	9	3

The optimal value equals 6.