All contents and pictures on this website come from the Internet and are updated regularly every week. They are for personal study and research only, and should not be used for commercial purposes. Thank you for your cooperation.
Design and implement a TwoSum class. It should support the following operations:
add and find.
add - Add the number to an internal data structure.
find - Find if there exists any pair of numbers which sum is equal to the
value.
Example 1:
add(1); add(3); add(5);
find(4) -> true
find(7) -> false
Example 2:
add(3); add(1); add(2);
find(3) -> true
find(6) -> false
Difficulty:
Easy
Lock:
Prime
All contents and pictures on this website come from the Internet and are updated regularly every week. They are for personal study and research only, and should not be used for commercial purposes. Thank you for your cooperation.