BOJ 13064 - Cameras [C++]

문제

링크

풀이

#include <iostream>
#include <string>
using namespace std;
 
inline bool digit(char c) {
  return '1' <= c && c <= '9';
}
 
inline bool upper(char c) {
  return 'A' <= c && c <= 'Z';
}
 
void solve(void) {
  string s; cin >> s;
 
  for (int i=0; i<8; i++) {
    if (i != 4 && !digit(s[i])) return;
    if (i == 4 && !upper(s[i])) return;
  }
  if (s[0] == s[1]) cout << s << "\n";
}
 
int main(void) {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
 
  int n; cin >> n;
  while (n--) solve();
  return 0;
}