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Past exam of the computer science course of the University of Cambridge
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Paper 1
2020
145
1
Paper 1
14
a
1
1
Solution
a
b
1
4
i
b
1
ii
b
1
c
1
1
Solution
c
d
1
4
i
d
1
ii
d
1
2
Paper 1
12
a
2
1
Solution
a
b
2
1
Solution
b
c
2
1
Solution
c
d
2
1
Solution
d
e
2
1
Solution
e
f
2
1
Solution
f
3
Paper 1
12
a
3
1
Solution
a
b
3
1
Solution
b
c
3
1
Solution
c
d
3
1
Solution
d
e
3
1
Solution
e
f
3
1
Solution
f
4
Paper 1
22
a
4
6
i
a
1
ii
a
1
iii
a
1
b
4
1
Solution
b
c
4
1
Solution
c
d
4
1
Solution
d
e
4
8
i
e
1
ii
e
1
iii
e
1
iv
e
1
5
Paper 1
16
a
5
8
i
a
1
ii
a
1
iii
a
1
iv
a
1
b
5
6
i
b
1
ii
b
1
iii
b
1
6
Paper 1
23
a
6
6
i
a
1
ii
a
1
iii
a
1
b
6
6
i
b
1
ii
b
1
iii
b
1
c
6
8
i
c
1
ii
c
1
iii
c
1
iv
c
1
7
Paper 1
8
a
7
1
Solution
a
b
7
1
Solution
b
c
7
1
Solution
c
d
7
1
Solution
d
8
Paper 1
10
a
8
1
Solution
a
b
8
1
Solution
b
c
8
1
Solution
c
d
8
1
Solution
d
e
8
1
Solution
e
9
Paper 1
8
a
9
1
Solution
a
b
9
1
Solution
b
c
9
1
Solution
c
d
9
1
Solution
d
10
Paper 1
10
a
10
1
Solution
a
b
10
1
Solution
b
c
10
1
Solution
c
d
10
1
Solution
d
e
10
1
Solution
e
Paper 2
2020
106
1
Paper 2
14
a
1
1
Solution
a
b
1
6
i
b
1
ii
b
1
iii
b
1
c
1
4
i
c
1
ii
c
1
2
Paper 2
13
a
2
1
Solution
a
b
2
8
i
b
1
ii
b
1
iii
b
1
iv
b
1
c
2
1
Solution
c
3
Paper 2
10
a
3
2
ii
a
1
b
3
4
i
b
1
ii
b
1
c
3
1
Solution
c
4
Paper 2
1
Solution
4
5
Paper 2
12
a
5
1
Solution
a
b
5
1
Solution
b
c
5
1
Solution
c
d
5
1
Solution
d
e
5
1
Solution
e
f
5
1
Solution
f
6
Paper 2
8
a
6
1
Solution
a
b
6
1
Solution
b
c
6
1
Solution
c
d
6
1
Solution
d
7
Paper 2
7
a
7
1
Solution
a
b
7
4
ii
b
1
iii
b
1
8
Paper 2
11
a
8
8
i
a
1
ii
a
1
iii
a
1
iv
a
1
b
8
1
Solution
b
9
Paper 2
11
a
9
1
Solution
a
b
9
6
i
b
1
ii
b
1
iii
b
1
c
9
1
Solution
c
10
Paper 2
9
a
10
1
Solution
a
b
10
1
Solution
b
c
10
4
i
c
1
ii
c
1
Paper 3
2020
134
1
Paper 3
10
a
1
1
Solution
a
b
1
1
Solution
b
c
1
1
Solution
c
d
1
1
Solution
d
e
1
1
Solution
e
2
Paper 3
13
a
2
1
Solution
a
b
2
1
Solution
b
c
2
8
i
c
1
ii
c
1
iii
c
1
iv
c
1
3
Paper 3
12
a
3
1
Solution
a
b
3
1
Solution
b
c
3
1
Solution
c
d
3
1
Solution
d
e
3
1
Solution
e
f
3
1
Solution
f
4
Paper 3
15
a
4
12
i
a
1
ii
a
1
iii
a
1
iv
a
1
v
a
1
vi
a
1
b
4
1
Solution
b
5
Paper 3
13
a
5
1
Solution
a
b
5
1
Solution
b
c
5
6
i
c
1
ii
c
1
iii
c
1
d
5
1
Solution
d
6
Paper 3
6
a
6
1
Solution
a
b
6
1
Solution
b
c
6
1
Solution
c
7
Paper 3
12
a
7
4
i
a
1
ii
a
1
b
7
1
Solution
b
c
7
4
i
c
1
ii
c
1
8
Paper 3
18
a
8
1
Solution
a
b
8
1
Solution
b
c
8
6
i
c
1
ii
c
1
iii
c
1
d
8
6
i
d
1
ii
d
1
iii
d
1
9
Paper 3
26
a
9
4
i
a
1
ii
a
1
b
9
4
i
b
1
ii
b
1
c
9
4
i
c
1
ii
c
1
d
9
8
i
d
1
ii
d
1
iii
d
1
iv
d
1
e
9
1
Solution
e
Paper 4
2020
107
1
Paper 4
8
a
1
1
Solution
a
b
1
1
Solution
b
c
1
1
Solution
c
d
1
1
Solution
d
2
Paper 4
15
a
2
6
i
a
1
ii
a
1
iii
a
1
b
2
1
Solution
b
c
2
1
Solution
c
d
2
1
Solution
d
e
2
1
Solution
e
3
Paper 4
10
a
3
1
Solution
a
b
3
1
Solution
b
c
3
1
Solution
c
d
3
1
Solution
d
e
3
1
Solution
e
4
Paper 4
10
a
4
1
Solution
a
b
4
1
Solution
b
c
4
1
Solution
c
d
4
1
Solution
d
e
4
1
Solution
e
5
Paper 4
8
a
5
1
Solution
a
b
5
1
Solution
b
c
5
1
Solution
c
d
5
1
Solution
d
6
Paper 4
11
a
6
1
Solution
a
b
6
6
i
b
1
ii
b
1
iii
b
1
c
6
1
Solution
c
7
Paper 4
14
a
7
6
ii
a
1
iii
a
1
iv
a
1
b
7
4
i
b
1
ii
b
1
c
7
1
Solution
c
8
Paper 4
14
a
8
6
i
a
1
ii
a
1
iii
a
1
b
8
6
ii
b
1
iii
b
1
iv
b
1
9
Paper 4
8
a
9
1
Solution
a
b
9
1
Solution
b
c
9
1
Solution
c
d
9
1
Solution
d
Paper 5
2020
93
1
Paper 5
13
a
1
1
Solution
a
b
1
1
Solution
b
c
1
1
Solution
c
d
1
1
Solution
d
e
1
4
i
e
1
ii
e
1
2
Paper 5
14
a
2
1
Solution
a
b
2
1
Solution
b
c
2
1
Solution
c
d
2
1
Solution
d
e
2
1
Solution
e
f
2
1
Solution
f
g
2
1
Solution
g
3
Paper 5
10
a
3
1
Solution
a
b
3
1
Solution
b
c
3
1
Solution
c
d
3
1
Solution
d
e
3
1
Solution
e
4
Paper 5
8
a
4
1
Solution
a
b
4
1
Solution
b
c
4
1
Solution
c
d
4
1
Solution
d
5
Paper 5
8
a
5
1
Solution
a
b
5
1
Solution
b
c
5
1
Solution
c
d
5
1
Solution
d
6
Paper 5
11
a
6
1
Solution
a
b
6
8
i
b
1
ii
b
1
iii
b
1
iv
b
1
7
Paper 5
9
a
7
1
Solution
a
b
7
2
ii
b
1
c
7
1
Solution
c
d
7
1
Solution
d
8
Paper 5
12
a
8
1
Solution
a
b
8
1
Solution
b
c
8
1
Solution
c
d
8
1
Solution
d
e
8
1
Solution
e
f
8
1
Solution
f
Paper 6
2020
109
1
Paper 6
4
a
1
1
Solution
a
b
1
1
Solution
b
2
Paper 6
8
a
2
1
Solution
a
b
2
1
Solution
b
c
2
1
Solution
c
d
2
1
Solution
d
3
Paper 6
12
a
3
1
Solution
a
b
3
1
Solution
b
c
3
1
Solution
c
d
3
1
Solution
d
e
3
1
Solution
e
f
3
1
Solution
f
4
Paper 6
8
a
4
1
Solution
a
b
4
1
Solution
b
c
4
1
Solution
c
d
4
1
Solution
d
5
Paper 6
9
a
5
1
Solution
a
b
5
6
i
b
1
ii
b
1
iii
b
1
6
Paper 6
17
a
6
1
Solution
a
b
6
1
Solution
b
c
6
1
Solution
c
d
6
4
i
d
1
ii
d
1
e
6
1
Solution
e
f
6
1
Solution
f
g
6
1
Solution
g
7
Paper 6
8
a
7
1
Solution
a
b
7
1
Solution
b
c
7
1
Solution
c
d
7
1
Solution
d
8
Paper 6
13
a
8
1
Solution
a
b
8
1
Solution
b
c
8
6
i
c
1
ii
c
1
iii
c
1
d
8
1
Solution
d
9
Paper 6
9
a
9
1
Solution
a
b
9
1
Solution
b
c
9
4
i
c
1
ii
c
1
10
Paper 6
11
a
10
1
Solution
a
b
10
1
Solution
b
c
10
6
i
c
1
ii
c
1
iii
c
1
Paper 7
2020
141
1
Paper 7
12
a
1
4
i
a
1
ii
a
1
b
1
1
Solution
b
c
1
1
Solution
c
d
1
2
ii
d
1
2
Paper 7
6
a
2
1
Solution
a
b
2
1
Solution
b
c
2
1
Solution
c
3
Paper 7
11
a
3
6
i
a
1
ii
a
1
iii
a
1
b
3
1
Solution
b
c
3
1
Solution
c
4
Paper 7
11
a
4
1
Solution
a
b
4
1
Solution
b
c
4
1
Solution
c
d
4
4
i
d
1
ii
d
1
5
Paper 7
13
a
5
4
ii
a
1
iii
a
1
b
5
1
Solution
b
c
5
1
Solution
c
d
5
1
Solution
d
e
5
1
Solution
e
6
Paper 7
14
a
6
8
i
a
1
ii
a
1
iii
a
1
iv
a
1
b
6
4
i
b
1
ii
b
1
7
Paper 7
15
a
7
10
i
a
1
ii
a
1
iii
a
1
iv
a
1
v
a
1
b
7
1
Solution
b
c
7
1
Solution
c
8
Paper 7
12
a
8
1
Solution
a
b
8
1
Solution
b
c
8
1
Solution
c
d
8
1
Solution
d
e
8
1
Solution
e
f
8
1
Solution
f
9
Paper 7
12
a
9
1
Solution
a
b
9
1
Solution
b
c
9
1
Solution
c
d
9
1
Solution
d
e
9
1
Solution
e
f
9
1
Solution
f
10
Paper 7
12
a
10
1
Solution
a
b
10
1
Solution
b
c
10
1
Solution
c
d
10
1
Solution
d
e
10
1
Solution
e
f
10
1
Solution
f
11
Paper 7
12
a
11
4
i
a
1
ii
a
1
b
11
6
i
b
1
ii
b
1
iii
b
1
Paper 8
2020
154
1
Paper 8
14
a
1
1
Solution
a
b
1
6
i
b
1
ii
b
1
iii
b
1
c
1
4
i
c
1
ii
c
1
2
Paper 8
10
a
2
1
Solution
a
b
2
1
Solution
b
c
2
1
Solution
c
d
2
1
Solution
d
e
2
1
Solution
e
3
Paper 8
7
a
3
2
ii
a
1
b
3
1
Solution
b
c
3
1
Solution
c
4
Paper 8
9
a
4
1
Solution
a
b
4
4
i
b
1
ii
b
1
c
4
1
Solution
c
5
Paper 8
7
a
5
2
ii
a
1
b
5
1
Solution
b
c
5
1
Solution
c
6
Paper 8
7
a
6
1
Solution
a
b
6
4
i
b
1
ii
b
1
7
Paper 8
6
a
7
1
Solution
a
b
7
1
Solution
b
c
7
1
Solution
c
8
Paper 8
15
a
8
4
i
a
1
ii
a
1
b
8
1
Solution
b
c
8
1
Solution
c
d
8
1
Solution
d
e
8
1
Solution
e
f
8
1
Solution
f
9
Paper 8
13
a
9
8
i
a
1
ii
a
1
iii
a
1
iv
a
1
b
9
1
Solution
b
c
9
1
Solution
c
10
Paper 8
6
a
10
1
Solution
a
b
10
1
Solution
b
c
10
1
Solution
c
11
Paper 8
8
a
11
1
Solution
a
b
11
1
Solution
b
c
11
1
Solution
c
d
11
1
Solution
d
12
Paper 8
10
a
12
1
Solution
a
b
12
1
Solution
b
c
12
1
Solution
c
d
12
1
Solution
d
e
12
1
Solution
e
13
Paper 8
4
a
13
1
Solution
a
b
13
1
Solution
b
14
Paper 8
7
a
14
1
Solution
a
b
14
4
i
b
1
ii
b
1
15
Paper 8
16
a
15
6
i
a
1
ii
a
1
iii
a
1
b
15
6
ii
b
1
iii
b
1
iv
b
1
c
15
1
Solution
c
Paper 9
2020
176
1
Paper 9
15
a
1
2
ii
a
1
b
1
4
i
b
1
ii
b
1
c
1
6
i
c
1
ii
c
1
iii
c
1
2
Paper 9
10
a
2
1
Solution
a
b
2
1
Solution
b
c
2
1
Solution
c
d
2
1
Solution
d
e
2
1
Solution
e
3
Paper 9
6
a
3
1
Solution
a
b
3
1
Solution
b
c
3
1
Solution
c
4
Paper 9
6
a
4
1
Solution
a
b
4
1
Solution
b
c
4
1
Solution
c
5
Paper 9
20
a
5
8
ii
a
1
iii
a
1
iv
a
1
v
a
1
b
5
8
i
b
1
ii
b
1
iii
b
1
iv
b
1
c
5
1
Solution
c
6
Paper 9
14
a
6
4
i
a
1
ii
a
1
b
6
8
i
b
1
ii
b
1
iii
b
1
iv
b
1
7
Paper 9
6
a
7
2
ii
a
1
b
7
2
ii
b
1
8
Paper 9
18
a
8
1
Solution
a
b
8
1
Solution
b
c
8
1
Solution
c
d
8
4
i
d
1
ii
d
1
e
8
6
i
e
1
ii
e
1
iii
e
1
9
Paper 9
14
a
9
6
i
a
1
ii
a
1
iii
a
1
b
9
1
Solution
b
c
9
1
Solution
c
d
9
2
iv
d
1
10
Paper 9
8
a
10
1
Solution
a
b
10
1
Solution
b
c
10
1
Solution
c
d
10
1
Solution
d
11
Paper 9
14
a
11
6
i
a
1
ii
a
1
iii
a
1
b
11
6
i
b
1
ii
b
1
iii
b
1
12
Paper 9
1
Solution
12
13
Paper 9
4
a
13
1
Solution
a
b
13
1
Solution
b
14
Paper 9
10
a
14
1
Solution
a
b
14
1
Solution
b
c
14
1
Solution
c
d
14
1
Solution
d
e
14
1
Solution
e
15
Paper 9
15
a
15
4
i
a
1
ii
a
1
b
15
4
i
b
1
ii
b
1
c
15
4
i
c
1
ii
c
1
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