import java.time.format.*;
import java.time.*;
import java.util.*;

class Main {
    public static void main(String[] args) {
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyyMMdd HHmmss")
            .withZone(ZoneId.of("UTC"));

        String input = "20220926 053459";
        long inputSeconds = ZonedDateTime.parse(input, formatter).toInstant().getEpochSecond();
        long nowSeconds = Instant.now().getEpochSecond();

        System.out.println("now = " + nowSeconds);
        System.out.println("input = " + inputSeconds);
        System.out.println("diff = " + (nowSeconds - inputSeconds));
    }
}