蓝桥杯Java组备赛（四）

news2024/11/25 4:33:28

高精度加法
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import java.math.BigInteger;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		BigInteger a,b;
		a = sc.nextBigInteger();
		b = sc.nextBigInteger();
		System.out.println(a.add(b));
		sc.close();
	}
}

高精度减法
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import java.math.BigInteger;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		BigInteger a,b;
		a = sc.nextBigInteger();
		b = sc.nextBigInteger();
		//System.out.println(a.add(b));
		System.out.println(a.subtract(b));
		sc.close();
	}
}

高精度乘法
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import java.math.BigInteger;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		BigInteger a,b;
		a = sc.nextBigInteger();
		b = sc.nextBigInteger();
		//System.out.println(a.add(b));
		//System.out.println(a.subtract(b));
		System.out.println(a.multiply(b));
		sc.close();
	}
}

高精度除法
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import java.math.BigInteger;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		BigInteger a,b;
		a = sc.nextBigInteger();
		b = sc.nextBigInteger();
		//System.out.println(a.add(b));
		//System.out.println(a.subtract(b));
		//System.out.println(a.multiply(b));
		System.out.println(a.divide(b));
		System.out.println(a.mod(b));
		sc.close();
	}
}

队列
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import java.util.Deque;
import java.util.LinkedList;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
    	Scanner sc = new Scanner(System.in);
    	int n = sc.nextInt();
    	int m = sc.nextInt();
    	Deque<Integer> dq = new LinkedList<>();
    	for(int i=1;i<=n;i++)
    		dq.addLast(i);
    	//1 2 3 4 5 6 7 8 9 10
    	while(!dq.isEmpty()) {
    		for(int i=1;i<m;i++) {
    			dq.addLast(dq.getFirst());
    			dq.removeFirst();
    		}
    		System.out.print(dq.getFirst()+" ");
    		dq.removeFirst();
    	}  
    	sc.close();
    }
}

搞心态
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import java.util.Deque;
import java.util.LinkedList;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int q = sc.nextInt();
		sc.nextLine();
		Deque<Integer> dq = new LinkedList<>();
		while(q!=0) {
			String[] s = sc.nextLine().split(" ");
			if(s.length == 2) {
				dq.addLast(Integer.parseInt(s[1]));
			}else {
				int n = Integer.parseInt(s[0]);
				if(n == 2) {
					dq.removeFirst();
				}else {
					System.out.println(dq.getFirst()+" "+dq.getLast());
				}
			}
			q--;
		}
		sc.close();
		}
}

队列模拟题目
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import java.util.Deque;
import java.util.LinkedList;
import java.util.Scanner;

public class Main {     
    public static void main(String[] args) {
    	Scanner sc = new Scanner(System.in);
    	int n = sc.nextInt();
    	sc.nextLine();//关键点
    	Deque<Integer> dq = new LinkedList<>();
    	while(n!=0) {
    		String[] s = sc.nextLine().split(" ");
    		if(s.length == 2) {
    			dq.addLast(Integer.parseInt(s[1]));
    		}else {
    			int m = Integer.parseInt(s[0]);
    			if(dq.isEmpty() && m == 2) {
    				System.out.println("lan");
    			}
    			if(dq.isEmpty() && m == 3) {
    				System.out.println("qiao");
    			}
    			if(!dq.isEmpty() && m == 2) {
    				dq.removeFirst();
    			}
    			if(!dq.isEmpty() && m == 3) {
    				System.out.println(dq.getFirst());
    			}
    			if(m == 4) {
    				System.out.println(dq.size());
    			}
    		}
    		n--;
    	}
    	sc.close();
    }                     
}