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A duck that is being chased by a fox saves itself by sitting at the center of circular pond of radius r. The duck can fly from land but cannot fly from the water. Furthermore, the fox cannot swim. The fox is four times faster than the duck. Assuming that the duck and fox are perfectly smart, is it possible for the duck to ever reach the edge of the pond and fly away to its escape from the ground
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Software Developer

Interviewed at Yandex

4.1★
Jan 7, 2013

A duck that is being chased by a fox saves itself by sitting at the center of circular pond of radius r. The duck can fly from land but cannot fly from the water. Furthermore, the fox cannot swim. The fox is four times faster than the duck. Assuming that the duck and fox are perfectly smart, is it possible for the duck to ever reach the edge of the pond and fly away to its escape from the ground

Given a string, that contains special character together with alphabets (‘a’ to ‘z’ and ‘A’ to ‘Z’), reverse the string in a way that special characters are not affected. Examples: Input: str = "a,b$c" Output: str = "c,b$a" Note that $ and , are not moved anywhere. Only subsequence "abc" is reversed Input: str = "Ab,c,de!$" Output: str = "ed,c,bA!$"
avatar

Software Developer

Interviewed at Zoho

4.2★
Mar 8, 2018

Given a string, that contains special character together with alphabets (‘a’ to ‘z’ and ‘A’ to ‘Z’), reverse the string in a way that special characters are not affected. Examples: Input: str = "a,b$c" Output: str = "c,b$a" Note that $ and , are not moved anywhere. Only subsequence "abc" is reversed Input: str = "Ab,c,de!$" Output: str = "ed,c,bA!$"

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