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This is CS50
1.
This is CS502.
2/3of CS50 students have never taken CS before
3.
what ultimately matters in this course is not so much whereyou end up relative to your classmates but where
you end up relative to yourself when you began
4.
input →→ output
5.
representation6.
7.
01234567898.
019.
12310.
1123
11.
101
123
12.
10010
1
123
13.
10010
1
123
100 × 1
14.
10010
1
123
100 × 1
+
15.
10010
1
123
100 × 1
+
10 × 2
16.
10010
1
123
100 × 1
+
10 × 2
+
17.
10010
1
123
100 × 1
+
10 × 2
+
1×3
18.
10010
1
123
100
+
20
+
3
19.
12320.
10010
1
000
21.
10010
1
001
22.
10010
1
002
23.
10010
1
003
24.
10010
1
004
25.
10010
1
005
26.
10010
1
006
27.
10010
1
007
28.
10010
1
008
29.
10010
1
009
30.
10010
1
010
31.
10010
1
000
32.
102101
100
000
33.
2221
20
000
34.
42
1
000
35.
42
1
001
36.
42
1
010
37.
42
1
011
38.
42
1
100
39.
42
1
101
40.
42
1
110
41.
42
1
111