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Buses 2

Instructions:

The table describes the number of passengers entering and leaving at stations A, B, C ... Bus arrives without passengers at the first station. All passengers get off on the last station. We do keep rules of decency - first get off and then get in.

Example

 
A
B
C
D
E
 got off 
0 0
0 3
5 1
3 5
11 8
 got on 
3 8
0 0
 in bus
2 3
8 1
 altogether
19


Solution

 
A
B
C
D
E
 got off 
0 0
0 3
5 1
3 5
11 8
 got on 
2 3
6 1
8 5
3 8
0 0
 in bus
2 3
8 1
11 5
11 8
 altogether
5
9
16
19


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