diff --git a/counting-bits/README.md b/counting-bits/README.md
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+- 문제: https://leetcode.com/problems/counting-bits/
+- 풀이: https://www.algodale.com/problems/counting-bits/
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diff --git a/group-anagrams/README.md b/group-anagrams/README.md
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+- 문제: https://leetcode.com/problems/group-anagrams/
+- 풀이: https://www.algodale.com/problems/group-anagrams/
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diff --git a/missing-number/README.md b/missing-number/README.md
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+- 문제: https://leetcode.com/problems/missing-number/
+- 풀이: https://www.algodale.com/problems/missing-number/
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diff --git a/number-of-1-bits/README.md b/number-of-1-bits/README.md
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+- 문제: https://leetcode.com/problems/number-of-1-bits/
+- 풀이: https://www.algodale.com/problems/number-of-1-bits/
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diff --git a/reverse-bits/README.md b/reverse-bits/README.md
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+- 문제: https://leetcode.com/problems/reverse-bits/
+- 풀이: https://www.algodale.com/problems/reverse-bits/
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