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@@ -1,5 +1,6 @@
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-##Quiz 1
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+## Quiz 1
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+
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There is a table World
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There is a table World
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+-----------------+------------+------------+--------------+---------------+
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+-----------------+------------+------------+--------------+---------------+
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@@ -23,7 +24,8 @@ For example, according to the above table, we should output:
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| Algeria | 37100000 | 2381741 |
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| Algeria | 37100000 | 2381741 |
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+--------------+-------------+--------------+
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+--------------+-------------+--------------+
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-##Quiz 2
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+## Quiz 2
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+
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Suppose that a website contains two tables, the Customers table and the Orders table. Write a SQL query to find all customers who never order anything. _(183. Customers Who Never Order)_
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Suppose that a website contains two tables, the Customers table and the Orders table. Write a SQL query to find all customers who never order anything. _(183. Customers Who Never Order)_
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Table: Customers.
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Table: Customers.
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@@ -53,7 +55,7 @@ Using the above tables as example, return the following:
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| Max |
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| Max |
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+-----------+
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+-----------+
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-##Quiz 3
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+## Quiz 3
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You're given strings J representing the types of stones that are jewels, and S representing the stones you have. Each character in S is a type of stone you have. You want to know how many of the stones you have are also jewels.
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You're given strings J representing the types of stones that are jewels, and S representing the stones you have. Each character in S is a type of stone you have. You want to know how many of the stones you have are also jewels.
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@@ -76,7 +78,7 @@ The letters in J are guaranteed distinct, and all characters in J and S are lett
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def num_jewels_in_stones(j, s)
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def num_jewels_in_stones(j, s)
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end
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end
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-##Quiz 4
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+## Quiz 4
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Initially, there is a Robot at position (0, 0). Given a sequence of its moves, judge if this robot makes a circle, which means it moves back to the original place.
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Initially, there is a Robot at position (0, 0). Given a sequence of its moves, judge if this robot makes a circle, which means it moves back to the original place.
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