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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
2 3
1 2
6 5
8 16
 got on 
3 5
0 0
 in bus
4 8
4 11
 altogether
24


Solution

 
A
B
C
D
E
 got off 
0 0
2 3
1 2
6 5
8 16
 got on 
4 8
2 6
8 7
3 5
0 0
 in bus
4 8
4 11
11 16
8 16
 altogether
12
15
27
24


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