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Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. An input string is valid if: Open brackets must be closed by the same type of brackets. Open brackets must be closed in the correct order. Every close bracket has a corresponding open bracket of the same type.
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Developer Associate

Interviewed at SAP

4.2★
Mar 4, 2025

Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. An input string is valid if: Open brackets must be closed by the same type of brackets. Open brackets must be closed in the correct order. Every close bracket has a corresponding open bracket of the same type.

Q1: Can you fix 6 + 4 = 4 by moving 1 matchstick? The ground rules are you cannot break a stick, it should be an equality (=), and you have to use 7-segment numbers (the block numbers 0 to 9 commonly seen on a calculator).
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Associate Applications Developer

Interviewed at Oracle

3.5★
Sep 18, 2022

Q1: Can you fix 6 + 4 = 4 by moving 1 matchstick? The ground rules are you cannot break a stick, it should be an equality (=), and you have to use 7-segment numbers (the block numbers 0 to 9 commonly seen on a calculator).

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