Infosys Company HR Interview Interview

3 policemen and 3 thieves had to cross a river using a small boat. Only two can use the boat for a trip. All the 3 policemen and only 1 thief knew to ride the boat. If 2 thiefs and 1 policeman were left behind they would kill him. But none of them escaped from the policemen. How would they be able to cross the river?

Read Solution (Total 2)

Let a,b,c are 3 policeman and 1,2,3 are 3 thieves (1 knows to sail the boat)
First of all a & 3 will go to other end, then b,c & 1,2 = a,3
a returns back and 1,2 will go to other end, then a,b,c = 1,2,3
1 return back and b,c will go to other end, then a,1 = b,c,2,3
b,2 will return back and 1,a will go to other end, then b,2 =a,c,1,3
c,3 will return back and b,c will go to the other end, then 2,3 = a,b,c,1
1 will return back and takes 2 with him to other end, then 3=a,b,c,1,2
1 will again return back and takes 3 with him and its over every body crossed
the river
8 years agoHelpfull: Yes(1) No(4)

police men p1,p2,p3 and thieves t1,t2,t3(t1 knows to sail the boat)
p1 & t1 will go to other end p1 leaves t1 there and returns back
p2 & t2 will go to other end p2 leaves t2 there and returns back
p3 & t3 will go to other end p3 leaves t3 there and returns back
p1,p2,p3=t1,t2,t3
now p1& p2 will go to other side and now t1 will returns back
t1 & p3 will cross the river
so all the policemen and thieves are cross the river
4 years agoHelpfull: Yes(0) No(0)

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