ACM模式常见输入输出专题（Java版）_java acm输入输出

目录

题号A: A+B(1)

题号B: A+B(2)

题号C: A+B(3)

题号D: A+B4)

题号E: A+B(5)

题号F: A+B(6)

题号G: A+B(7)

题号H: 字符串排序（1）

题号I 字符串排序（2）

题号G: 字符串排序（3）

题目K: 自测本地通过提交为0

---

题号A: A+B(1)

import java.util.Scanner;
 
public class Main{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while(sc.hasNext()) {
            int a = sc.nextInt();
            int b = sc.nextInt();
            System.out.println(a + b);
        }
    }
}

---

题号B: A+B(2)

import java.util.Scanner;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int num = sc.nextInt();
        while(num!=0){
            int a = sc.nextInt();
            int b = sc.nextInt();
            System.out.println(a+b);
            num--;
        }
    }
}
 

---

题号C: A+B(3)

// 方法1
import java.util.Scanner;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        while(a!=0 && b!=0){
            System.out.println(a+b);
            a = sc.nextInt();
            b = sc.nextInt();
        }
    }
}
 
//方法2
import java.util.Scanner;
public class Main{
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        while(in.hasNextLine()){
            int a = in.nextInt();
            int b = in.nextInt();
            if(a==0&&b==0){
                break;
            }
            System.out.println(a+b);
        }
    }
}

---

题号D: A+B4)

import java.util.Scanner;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        while(sc.hasNextLine()){
            int num = sc.nextInt();
            int sum = 0;
            for(int i = 0;i<num;i++){
                sum += sc.nextInt();
            }
            if(num == 0){
                break;
            }
            System.out.println(sum);
        }
    }
}

---

题号E: A+B(5)

import java.util.Scanner;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int num = sc.nextInt();
        while(num-->0){
            int a = sc.nextInt();
            int sum = 0;
            for(int i = 0; i < a; i++){
                sum += sc.nextInt();
            }
            System.out.println(sum);
        }
    }
}

---

题号F: A+B(6)

import java.util.Scanner;
 
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        while(sc.hasNextInt()){ //或者使用hasNext()
            int num = sc.nextInt();
            int sum = 0;
            while(num-->0){
                sum += sc.nextInt();
            }
            System.out.println(sum);
        }
    }
}
 

---

题号G: A+B(7)

import java.util.Scanner;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        while(sc.hasNextLine()){
            int sum = 0;
            String[] arr = sc.nextLine().split(" ");
            for(String str:arr){
                sum += Integer.parseInt(str);
            }
            System.out.println(sum);
        }
    }
}

---

题号H: 字符串排序（1）

import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int num = sc.nextInt();
        while(sc.hasNextLine()){
           String[] str = sc.nextLine().split(" ");
            Arrays.sort(str);
            for(int i = 0;i < str.length-1; i++){
                System.out.print(str[i] + ' ');
            } 
            System.out.print(str[str.length-1]);
        }
    }
}

---

题号I 字符串排序（2）

//方法1
import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        while(sc.hasNextLine()){
            String[] str = sc.nextLine().split(" ");
            Arrays.sort(str);
            print(str);
            System.out.println();
        }
    }
    public static void print(String[] str){
        for(int i = 0;i < str.length;i++){
            String output = (i == (str.length-1)) ? str[i] : str[i]+' ';
            System.out.print(output);
        }
    }
}
 
//方法2
 
import java.util.*;
 
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        while(sc.hasNextLine()){
            String[] str = sc.nextLine().split(" ");
            Arrays.sort(str);
            StringBuffer sb = new StringBuffer();
            for(String s:str){
                sb.append(s).append(" ");
            }
            System.out.println(sb.substring(0,sb.length()-1)); //去掉最后一个空格
}
    }
}

---

题号G: 字符串排序（3）

//方法1
import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        while(sc.hasNextLine()){
            String[] str = sc.nextLine().split(",");
            Arrays.sort(str);
            print(str);
            System.out.println();
        }
    }
    public static void print(String[] str){
        for(int i = 0;i < str.length;i++){
            String output = (i == (str.length-1)) ? str[i] : str[i]+',';
            System.out.print(output);
        }
    }
}
 
 
//方法2
import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        while(sc.hasNext()){
            String[] str = sc.nextLine().split(",");
            Arrays.sort(str);
            StringBuilder sb = new StringBuilder();
            
            for(String s:str){
                sb.append(s).append(",");
            }
            System.out.println(sb.deleteCharAt(sb.length()-1).toString());//去掉最后一个分号
        }
    }
}

---

题目K: 自测本地通过提交为0

 注意：取值范围是（0,2X10^10），最大值会超过Integer的范围。

import java.util.*;
 
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        //注意取值范围，用什么样的容器接数据
        while(sc.hasNextLong()){
            Long a = sc.nextLong();
            Long b = sc.nextLong();
            System.out.println(a+b);
        }
    }
}

练习链接：牛客竞赛_ACM/NOI/CSP/CCPC/ICPC算法编程高难度练习赛_牛客竞赛OJ (nowcoder.com)