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LeetCode/problems/cpp/largest-odd-number-in-string.cpp

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#include <string>
class Solution {
public:
std::string largestOddNumber(const std::string& num) {
auto i = num.find_last_of("13579");
if (i == std::string::npos) {
return "";
}
return num.substr(0, i + 1);
}
};