小喵 🐈 => YSITD: #include <iostream> #include <string> using namespace std; int main() { string str; while (cin >> str) { string upper_str, lower_str; unsigned long has_char[4] = {}; for (char ch : str) { if (has_char[ch % 4] & 1 << (ch / 4)) continue; has_char[ch % 4] |= 1 << (ch / 4); if ('a' <= ch && ch <= 'z') { lower_str += ch; } else { upper_str += ch; } } cout << upper_str << lower_str << endl; } return 0; } #5c56fee9483acc658328323e

小喵 🐈 says to YSITD

#include <iostream> #include <string> using namespace std; int main() { string str; while (cin >> str) { string upper_str, lower_str; unsigned long has_char[4] = {}; for (char ch : str) { if (has_char[ch % 4] & 1 << (ch / 4)) continue; has_char[ch % 4] |= 1 << (ch / 4); if ('a' <= ch && ch <= 'z') { lower_str += ch; } else { upper_str += ch; } } cout << upper_str << lower_str << endl; } return 0; }

at Sun, Feb 3, 2019 10:47 PM