2001:
1: 2*0+0+1
2: 2+0+0+1
3: 2+0+0+1
4: 2+0!+0+1
5: 2+0!+0!+1
6: (2+0!)!+0*1
7: (2+0!)!+0+1
8: (2+0!)!+0!+1
9: int(sqrt(sqrt(((2+0!)!+0!)!))+1)
10: 20/(0!+1)
11: int(sqrt(sqrt(sqrt(sqrt((20+0-1)!)))))
12: 2*(0!+0!+0!)!
13: int(sqrt(200))-1
14: int(sqrt(200))*1
15: int(sqrt(200))+1
16: int(sqrt(sqrt(sqrt(sqrt(20!))))*sqrt(sqrt(0!+1)))
17: int(sqrt(sqrt(sqrt(sqrt((20+0+1)!)))))
18: 20-0!-1
19: 20+0-1
20: 20+0*1
21: 20+0+1
22: 20+0!+1