import java.util.Scanner;

public class C022 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        while (in.hasNext()) {
          int t = in.nextInt();
          for(int r = 0; r < t; r++){
            int a = in.nextInt();
            int b = in.nextInt();
            int c = 0;
            if(a == b){
              if((a%2)==1)
                 System.out.println("case "+ (r+1) + ": " + a);
             else
                 System.out.println("case "+ (r+1) + ": 0");
            }
            else{
              while(a <= b){
                 if((a%2)==1){
                    c += a;
                    a += 2;
                 }
                 else{
                    a++;
                    c += a;
                    a += 2;
                }
              }
            System.out.println("case "+ (r+1) + ": " +c);
            }
           }
        }
    }
}

 請問一下 為什麼會RE?  在讀取格式上是有漏掉什麼嗎?

public class C022 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        while (in.hasNext()) {
          int t = in.nextInt();
          for(int r = 0; r < t; r++){
            int a = in.nextInt();
            int b = in.nextInt();
            int c = 0;
            if(a == b){
              if((a%2)==1)
                 System.out.println("case "+ (r+1) + ": " + a);
             else
                 System.out.println("case "+ (r+1) + ": 0");
            }
            else{
              while(a <= b){
                 if((a%2)==1){
                    c += a;
                    a += 2;
                 }
                 else{
                    a++;
                    c += a;
                    a += 2;
                }
              }
            System.out.println("case "+ (r+1) + ": " +c);
            }
           }
        }
    }
}

 請問一下 為什麼會RE?  在讀取格式上是有漏掉什麼嗎?

我也是用JAVA寫...

 也一直RE...

有神人用JAVA寫過的嗎?0.0

public class C022 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        while (in.hasNext()) {
          int t = in.nextInt();
          for(int r = 0; r < t; r++){
            int a = in.nextInt();
            int b = in.nextInt();
            int c = 0;
            if(a == b){
              if((a%2)==1)
                 System.out.println("case "+ (r+1) + ": " + a);
             else
                 System.out.println("case "+ (r+1) + ": 0");
            }
            else{
              while(a <= b){
                 if((a%2)==1){
                    c += a;
                    a += 2;
                 }
                 else{
                    a++;
                    c += a;
                    a += 2;
                }
              }
            System.out.println("case "+ (r+1) + ": " +c);
            }
           }
        }
    }
}

 請問一下 為什麼會RE?  在讀取格式上是有漏掉什麼嗎?

AC了...

把while拿掉試試看...