PUMaC 2007 · 组合（B 组） · 第 5 题
PUMaC 2007 — Combinatorics (Division B) — Problem 5
题目详情
- Find the sum of all three digit numbers (written in base 10) such that the leading digit is the sum of other two digits. Express your answer in base 10.
解析
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Original Explanation
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