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added Armstrong_Number #436

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10 changes: 10 additions & 0 deletions Leetcode/Armstrong_Number.cpp
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Original file line number Diff line number Diff line change
@@ -0,0 +1,10 @@
class Solution {
public:
bool isArmstrong(int N) {
const auto& n_str = to_string(N);
return accumulate(n_str.cbegin(), n_str.cend(), 0,
[&](const auto& x, const auto& y) {
return x + pow(y - '0', n_str.length());
}) == N;
}
}