BOJ 21355 - Personnummer [C++]

문제

링크

풀이

#include <iostream>
#include <string>
using namespace std;
 
void solve(void) {
  string s; cin >> s;
 
  cout << (s[0] < '2') + (s[6] == '-') + 18 << s.substr(0, 6) << s.substr(7, 4);
}
 
int main(void) {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
 
  solve();
  return 0;
}