31 lines
1.2 KiB
C++
31 lines
1.2 KiB
C++
#include <cctype>
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#include <algorithm>
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#include <string>
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#include <cstdio>
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/**
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* 520. Detect Capital
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* We define the usage of capitals in a word to be right when one of the following cases holds:
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* All letters in this word are capitals, like "USA".
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* All letters in this word are not capitals, like "leetcode".
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* Only the first letter in this word is capital, like "Google".
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* Given a string word, return true if the usage of capitals in it is right.
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*/
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class Solution {
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public:
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static bool detectCapitalUse(const std::string& word) {
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// auto n = std::count_if(word.begin(), word.end(), [](int x) { return (bool)std::isupper(x); });
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// Leetcode did not accept direct usage of std::isupper, but MSVC does.
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const auto n = std::count_if(word.begin(), word.end(), std::isupper);
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return (word.length() == n) || (!n) || (n == 1 && std::isupper(*word.begin()));
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}
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};
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int main() {
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std::printf("%s\n", Solution::detectCapitalUse("USA") ? "true" : "false");
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std::printf("%s\n", Solution::detectCapitalUse("leetcode") ? "true" : "false");
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std::printf("%s\n", Solution::detectCapitalUse("Google") ? "true" : "false");
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std::printf("%s\n", Solution::detectCapitalUse("FlaG") ? "true" : "false");
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}
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