26 lines
677 B
C++
26 lines
677 B
C++
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/* Problem: https://leetcode.com/problems/letter-case-permutation/
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*/
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#include "lib_leetcode.h"
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#include <iostream>
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#include <string>
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#include <vector>
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std::vector<std::string> solution(const std::string input) {
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std::vector<std::string> perms = {""};
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for (const char c : input) {
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for (std::size_t i = 0, upto = perms.size(); i < upto; i++) {
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if (std::isalpha(c))
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perms.push_back(perms[i] + (char)std::toupper(c));
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perms[i] += std::tolower(c);
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}
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}
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return perms;
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}
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int main() {
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std::cout << solution("a1b2") << '\n'
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<< solution("3z4") << '\n'
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<< solution("mQe") << '\n'
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<< solution("03fH") << '\n';
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}
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