杭電OJ 2072、2081、2093、2091、1004、2057題
阿新 • • 發佈：2019-01-22
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最近刷題甚是痛苦，一方面進入實驗室只能把零碎時間刷題；另一個方面感覺自己心浮氣躁、通過率不高且靜不下心來。
2072題：
import java.util.*; public class Main { public static void main(String[] args) { Scanner sc_01 = new Scanner(System.in); while (sc_01.hasNext()) { String strings_01 = sc_01.nextLine(); //判斷有沒有# boolean flag = false; if (strings_01.contains("#")) { flag = true; } if (flag == true) break; //進行正常判斷 int test_result = checkZimu(strings_01); System.out.println(test_result); } } private static int checkZimu(String strings_01) { String[] words = strings_01.split(" "); ArrayList<String> arrayList_01 = new ArrayList<String>(); for (int i = 0; i < words.length; i++) { if (!arrayList_01.contains(words[i])) { arrayList_01.add(words[i]); } } if(arrayList_01.contains("")){ return arrayList_01.size()-1; }else{ return arrayList_01.size(); } } }
2081題：
import java.util.*; public class Main { public static void main(String[] args) { Scanner sc_01 = new Scanner(System.in); int line_num = sc_01.nextInt(); for(int i = 0;i<line_num;i++){ String init_str = sc_01.next(); System.out.println("6"+init_str.substring(6,11));//從下表為0的開始計數，下標為6，長度為5 } } }
2093題：
這道題我做的老有問題，別人的可以參考下。
import java.util.ArrayList; import java.util.List; import java.util.Scanner; public class Main { private static Scanner scanner; static List<Main.person> list; public static void main(String[] args) { scanner = new Scanner(System.in); int probrom = scanner.nextInt();// 題目數量 int pubScore = scanner.nextInt();// 單位罰分 list = new ArrayList<Main.person>(); while (scanner.hasNext()) { int ac = 0;// ac題目個數 int score = 0;// 罰分 String name = "";// 姓名 String strings[] = new String[probrom + 1]; // 輸入一個考生的資訊 // strings[0]是名字 for (int i = 0; i < strings.length; i++) { strings[i] = scanner.next(); } name = strings[0]; // 計算AC題目個數 for (int i = 1; i < strings.length; i++) { char ch = strings[i].charAt(0); if (ch >= '1' && ch <= '9') { ac++; try { score += Integer.parseInt(strings[i]); } catch (Exception e) { } } } // 計算分數 for (int i = 1; i < strings.length; i++) { // 第i個元素的 最後一個字元是否為')'// 也可以使用contains char ch = strings[i].charAt(strings[i].length() - 1); if (ch == ')') { String[] split = strings[i].split("[(,)]"); score += pubScore * Integer.parseInt(split[1]) + Integer.parseInt(split[0]); } } Main p = new Main(); person per = p.new person(ac, score, name); list.add(per); } listSort(); for (person person : list) { System.out.printf("%-10s %2d %4d", person.getName(), person.getAcNum(), person.getScore()); System.out.println(); } } // 排序 private static void listSort() { for (int i = 0; i < list.size() - 1; i++) { for (int j = i + 1; j < list.size(); j++) { String iName = list.get(i).getName(); String jName = list.get(j).getName(); int iAc = list.get(i).getAcNum(); int jAc = list.get(j).getAcNum(); int iScore = list.get(i).getScore(); int jScore = list.get(j).getScore(); if (iAc < jAc) { sort(i, j); } else if (iAc == jAc) { if (iScore > jScore) { sort(i, j); } else if (iScore == jScore) { int compareTo = iName.compareTo(jName); if (compareTo > 0) { sort(i, j); } } } } } } // 交換 public static void sort(int i, int j) { int temp = list.get(i).getAcNum(); list.get(i).setAcNum(list.get(j).acNum); list.get(j).setAcNum(temp); temp = list.get(i).getScore(); list.get(i).setScore(list.get(j).score); list.get(j).setScore(temp); String string = list.get(i).getName(); list.get(i).setName(list.get(j).getName()); list.get(j).setName(string); } class person { int acNum; int score; String name; public person(int acNum, int score, String name) { super(); this.acNum = acNum; this.score = score; this.name = name; } public void setAcNum(int acNum) { this.acNum = acNum; } public void setScore(int score) { this.score = score; } public void setName(String name) { this.name = name; } public int getAcNum() { return acNum; } public int getScore() { return score; } public String getName() { return name; } } }
2091題：
import java.util.*;
public class Main {
public static void main(String[] args) {
Scanner sc_01 = new Scanner(System.in);
int flag = 0;//設定第一次的標誌位
while (sc_01.hasNext()) {
String chars = sc_01.next();
if (!chars.equals("@")) {
int chars_line = sc_01.nextInt();
//根據標誌位判斷中間有沒有空行。和之前的格式不同，之前的格式都是第一行之後輸出空行的。
if (flag != 0) {
System.out.println();
}
flag++;
//如果只有一行的話
if (chars_line == 1) {
System.out.println(chars);
} else {
//若有多行的話
for (int i = 1; i < chars_line; i++) {
//前面的空格個數
for (int j = chars_line; j > i; j--) {
System.out.print(" ");
}
//輸出字串
System.out.print(chars);
//輸出其他字串
if (i != 1) {
for (int k = 1; k <= 2 * (i - 2) + 1; k++) {
System.out.print(" ");
}
System.out.print(chars);
}
//每一行空行
System.out.println();
}
//最後一行字串
for (int i = 1; i <= (chars_line * 2 - 1); i++) {
System.out.print(chars);
}
System.out.println();
}
} else {
break;
}
}
}
}
1004題：
import java.util.*;
public class Main {
public static void main(String[] args) {
Scanner sc_01 = new Scanner(System.in);
while (sc_01.hasNext()) {
int num_lin = sc_01.nextInt();
//判斷是否包含
ArrayList<String> arrayList_01 = new ArrayList<String>();
//進行新增
ArrayList<Counting> arrayList_02 = new ArrayList<Counting>();
//輸入所有String字串
if (num_lin != 0) {
for (int i = 0; i < num_lin; i++) {
String strings = sc_01.next();
if (!arrayList_01.contains(strings)) {
//若輸入的字串不在該陣列中。
Counting counting_01 = new Counting();
counting_01.conting = 1;
counting_01.color_name = strings;
arrayList_02.add(counting_01);
arrayList_01.add(strings);
} else {
for (int j = 0; j < arrayList_02.size(); j++) {
if (arrayList_02.get(j).color_name.equals(strings)) {
arrayList_02.get(j).conting++;
}
}
}
}
} else {
break;
}
int Max = arrayList_02.get(0).conting;
String MaxStrings = arrayList_02.get(0).color_name;
//統計
for (int k = 0; k < arrayList_01.size() - 1; k++) {
if (Max < arrayList_02.get(k + 1).conting){
//只儲存當時最大的值
Max = arrayList_02.get(k+1).conting;
MaxStrings = arrayList_02.get(k+1).color_name;
}
}
System.out.println(MaxStrings);
}
}
private static class Counting {
private static String color_name;
private static int conting;
}
}2057題：
import java.util.*;
public class Main {
public static void main(String[] args) {
Scanner sc_01 = new Scanner(System.in);
while (sc_01.hasNext()){
String num_01 = sc_01.next();
String num_02 = sc_01.next();
//1.先將字串轉為十六進位制,十六進位制轉為十進位制
long result = Long.parseLong(num_01, 16)+ Long.parseLong(num_02,16);
if(result>=0){
System.out.println(Long.toHexString(result).toUpperCase());
}else {
System.out.println("-"+(Long.toHexString(Math.abs(result))).toUpperCase());
}
}
}
}