面试中常用到机试题

public class Text3 {
	private static String str;
	public static void readIn(){
	Scanner in = new Scanner(System.in);
	  str = in.next();
	  System.out.print(compressStr(str)); 
		
	}
   
	//对连续重复的字符串进行字符串的压缩操作
	public static StringBuffer compressStr(String str){
		StringBuffer sb = new StringBuffer();
		int count;
		for(int i=0;i<str.length();i=i+count){
			char temp = str.charAt(i);
			count = 1;
			for(int j=i+1;j<str.length();j++){
				if(str.charAt(j)==temp){
					count++;
				}else{
					break;
				}
			}
			if(count!=1){
				sb.append(count);
			}
			sb.append(temp);
			
		}
		
		return sb;
	}
	public static void main(String[] args) {
		/*System.out.print(Text3.compressStr("xxxyyyyzzxx"));
		System.out.print(Text3.compressStr("xyzewrs"));*/
		Text3.readIn();
		

	}

}

package TEXT;

import Test.Test10;

public class Text1 {

 //有没有一种是求解差集的思想在里面
	
	//定义一个函数，判断这个数是否满足a的定义,暂定为在100的范围以内
	public static boolean judge(int m){
		int a = m/10;
		int b = m%10;
		/*System.out.print(a);
		System.out.print(b);*/
		if(!IsSame(m)){
			for(int j=(a-1)*10;j<=a*10;j++){
				int sum = j+j/10+j%10;
				if(sum==m){
					return true;
				}
			}
			
		}else if(IsSame(m)){
			for(int j=(a-2)*10;j<=(a+1)*10;j++){
				int sum = j+j/10+j%10;
				if(sum==m){
					return true;
				}
			
			}
		}
		return false;
		
	}
	public static boolean IsSame(int m){
		int a = m/10%2;
		int b = m%10%2;
		return a==b?true:false;
	}
	public static void print(){
		for(int i=1;i<100;i++){
			if(!judge(i)){
				System.out.print(i);
				System.out.println();
			}
		}
		
	}
	public static void main(String[] args) {
		// TODO Auto-generated method stub
        /*System.out.print(Text1.judge(55));*/
		Text1.print();
	}

}

package TEXT;

public class Text2 {

	//约瑟夫环
      public static void Josephus(int N, int M)  
	    {  
	        int f[] = new int[100];  
	        f[1] = 0;  //说明默认是从第一数字开始进行的
	        for(int i = 2; i <= N; i++)  
	        {  
	            f[i] = (f[i - 1] + M) % i;  
	        }  
	        System.out.print((f[N]+1)+" ");  
	    }  
	public static void main(String[] args) {
		// TODO Auto-generated method stub
        Text2.Josephus(10, 8);
	}

}