爱奇艺AC 2.2

1、平方和最小  AC
import java.util.Arrays;
import java.util.HashMap;
import java.util.Scanner;

public class Main {  public static void main(String[] args) {   Scanner sc=new Scanner(System.in);   while(sc.hasNext()){    String s=sc.nextLine();    HashMap<Character,Integer> hash= new HashMap<>();    int k=sc.nextInt();    int n=s.length();    for(int i=0;i<n;i++){    char c=s.charAt(i);    if(hash.containsKey(c))hash.put(c, hash.get(c)+1);    else hash.put(c,1);    }    int len=hash.size();    int []ar=new int[len];    int i=0;    for(Character key:hash.keySet())    ar[i++]=hash.get(key);    produce(k,ar);    int sum=0;    for(i=0;i<len;i++){    sum+=ar[i]*ar[i];    }        System.out.println(sum);   }  }  private static void produce(int k, int[] ar) {  int n =ar.length;  for(int i=0;i<k;i++){  Arrays.sort(ar);  if(ar[n-1]>0)ar[n-1]-=1;  else break;  }  }
}

2、博弈论 ，牛牛羊羊吃草  AC
import java.util.Scanner;

public class Main {  public static void main(String[] args) {   Scanner sc=new Scanner(System.in);   while(sc.hasNext()){    int t=sc.nextInt();   for(int i=0;i<t;i++){    long x=sc.nextLong();    x%=5;    if(x==2||x==0)System.out.println("yang");    else System.out.println("niu");   }   }  }
}

	

3、 无聊 0.2
没什么思路
import java.util.Scanner;
public class Main {  public static void main(String[] args) {   Scanner sc=new Scanner(System.in);   while(sc.hasNext()){    int n=sc.nextInt();    int m=sc.nextInt();    double x=(m+n)*1.0/2;    System.out.printf("%.1f",x);   }  }
}