每天的记录在第一行给出记录的条目数M (M > 0 ),下面是M行,每行的格式为 证件号码 签到时间 签离时间 其中时间按“小时:分钟:秒钟”(各占2位)给出,证件号码是长度不超过15的字符串。
对每一天的记录输出1行,即当天开门和关门人的证件号码,中间用1空格分隔。 注意:在裁判的标准测试输入中,所有记录保证完整,每个人的签到时间在签离时间之前,且没有多人同时签到或者签离的情况。
3 CS301111 15:30:28 17:00:10 SC3021234 08:00:00 11:25:25 CS301133 21:45:00 21:58:40
SC3021234 CS301133
import java.util.Scanner; // 注意类名必须为 Main, 不要有任何 package xxx 信息 public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); while (scanner.hasNext()) { int n = scanner.nextInt(); String[] strNo = new String[n]; String[] strStart = new String[n]; String[] strEnd = new String[n]; for (int i = 0; i < n; i++) { strNo[i] = scanner.next(); strStart[i] = scanner.next(); strEnd[i] = scanner.next(); } //开门人,时间最小 int indexMini = 0; for (int i = 0; i < n; i++) { String timeString = strStart[i].substring(0, 2) + strStart[i].substring(3,5) + strStart[i].substring(6); int time = Integer.parseInt(timeString); String timeStringIndex = strStart[indexMini].substring(0, 2) + strStart[indexMini].substring(3,5) + strStart[indexMini].substring(6); int timeIndex = Integer.parseInt(timeStringIndex); if (time <= timeIndex) { indexMini = i; } } System.out.print(strNo[indexMini] + " "); //关门人,时间最大 int indexMax = 0; for (int i = 0; i < n; i++) { String timeString = strEnd[i].substring(0, 2) + strEnd[i].substring(3,5) + strEnd[i].substring(6); int time = Integer.parseInt(timeString); String timeStringIndex = strEnd[indexMax].substring(0, 2) + strEnd[indexMax].substring(3,5) + strEnd[indexMax].substring(6); int timeIndex = Integer.parseInt(timeStringIndex); if (time >= timeIndex) { indexMax = i; } } System.out.println(strNo[indexMax]); } } }
import java.util.Scanner; import java.util.TreeMap; public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); int n = scanner.nextInt(); TreeMap<String, String> open = new TreeMap<>(); TreeMap<String, String> close = new TreeMap<>(); for (int i = 0; i < n; i++) { String id = scanner.next(); open.put(scanner.next(),id); close.put(scanner.next(),id); } System.out.println(open.firstEntry().getValue()+" "+close.lastEntry().getValue()); } }