Back to the Challenge 
The map below shows the street locations of a city. Position the minimum number of police officers so that any point on any street can be seen by at least one officer.
| S | S | M | T | W | T | F |
|---|---|---|---|---|---|---|
| « May | Jul » | |||||
| 1 | 2 | 3 | 4 | 5 | ||
| 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 13 | 14 | 15 | 16 | 17 | 18 | 19 |
| 20 | 21 | 22 | 23 | 24 | 25 | 26 |
| 27 | 28 | 29 | 30 | |||
Aya Mohammed Yahia Said:
on June 13, 2009 at 5:54 pm
how a3ayez eah el mkan elly
feeh a2al polic offcer walla el tarek ely yemshy feeh bas be2a2al polic offcer
Tasniem Seliem Said:
on June 13, 2009 at 5:59 pm
http://img297.imageshack.us/img297/4962/tdehgjolklhj.jpg
Aya Mohammed Yahia Said:
on June 13, 2009 at 6:23 pm
k
TeCNoYoTTa Said:
on June 13, 2009 at 6:25 pm
H,B,G
and sry Jaqoup
Amr Saqr Said:
on June 13, 2009 at 6:47 pm
3 officers
J & F & A
Abu-Bakr Taha Said:
on June 13, 2009 at 7:51 pm
one at C
and one at H
so two officers only
Mohamed AbdElMonem Said:
on June 13, 2009 at 9:02 pm
@ TeCNoYotta, only one winner till now
Hint : law A we B we C 3ala 5at wa7ed bnafs el tarteb da law el officer 3and A hyshof B bas lkn mosh hyshof C 3shan B hatkon m5byah
Proud To Be Muslim Said:
on June 13, 2009 at 9:38 pm
A,F,G
Fatma Samy Said:
on June 13, 2009 at 10:25 pm
At –> A,F and G
Eman Said:
on June 13, 2009 at 10:28 pm
How about:
- C: B, D, G, F
- E: A, H, F
- J: I, K, G.
So F & G are reapeted twice, with only 3 officers!
Jaqoup Said:
on June 13, 2009 at 10:45 pm
Fatma & Eman : not all streets will be visible
Eman the street between B & I
Eman Said:
on June 13, 2009 at 11:13 pm
Then I put another officer @ F. But don’t ask me about the repeated ones
Fatma Samy Said:
on June 14, 2009 at 12:10 am
A,F,G and B ?
:D
Abu-Bakr Taha Said:
on June 14, 2009 at 12:25 am
C, A, H, J, G, F
Mohamed AbdElMonem Said:
on June 14, 2009 at 1:03 am
@ Eman , Fatma Samy & Abu-Bakr , No
fe a2al mn keda 
sara el_sebaiee Said:
on June 14, 2009 at 1:19 am
G,H,C,B,F
Mohamed AbdElMonem Said:
on June 14, 2009 at 2:11 am
@ sara el_sebaiee, No fe a2al bardo
bosboss Said:
on June 14, 2009 at 2:13 am
C >> G , K , D , B , A , f , H
H >> I , J , E
Eman_Elmaged Said:
on June 14, 2009 at 6:19 am
i think F
Aya Magdy Said:
on June 14, 2009 at 9:35 am
سلم عليكم
اعتقد ان الاماكن هتكون
F , G , A
A –>B , E
G –>D , J , K
F –>C , I
————–
Rana Said:
on June 14, 2009 at 1:25 pm
G, H, J
Mohamed AbdElMonem Said:
on June 14, 2009 at 1:48 pm
@ bosboss, Eman_Elmaged, Aya Magdy & Rana , NO
ManS Said:
on June 14, 2009 at 2:26 pm
http://img200.imageshack.us/img200/6816/26263828.jpg
i think in H , B and G
Rana Said:
on June 14, 2009 at 3:25 pm
C,I,H
May Said:
on June 14, 2009 at 6:49 pm
i say C, E and I
Kholoud Said:
on June 14, 2009 at 11:36 pm
I think H , B , G
Rokaya Said:
on June 15, 2009 at 12:16 am
i think F only
Aya Magdy Said:
on June 15, 2009 at 12:48 am
اعتقد هاتكون
B , G , H
!!!!!!!!!!!!!!
Aya Magdy Said:
on June 15, 2009 at 12:59 am
انا لسه واخدة بالى ان فى تعليق كاتب
“not all streets will be visible” by Jaqoup
كده الانا فهمته ان كل النقط تتشاف و مش مهم الطرق
لو كده يكون المفروض الحل
Positions at E , F , G
E–>A , F , H
F–>B , C , G , I , H , E
G –> D , K , J ,F , C
انا فهمت صح ولا دخلت المواضيع فى بعضها
Aya Ahmed Said:
on June 15, 2009 at 1:17 am
B & C
Fatma Samy Said:
on June 15, 2009 at 8:03 pm
F,G and B ?
marmoor1989 Said:
on June 15, 2009 at 9:33 pm
H and C
marmoor1989 Said:
on June 15, 2009 at 9:46 pm
what do u mean by “not all streets will be visible”??
Jaqoup Said:
on June 16, 2009 at 2:06 am
@marmoor1989:: i mean that there will be some streets where no officer will be able to look at it,
no direct line passing though that street and the officer
Police Officers !! [Answered] « acmASCIS Weblog Said:
on June 19, 2009 at 1:39 am
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