0326小红书笔试

Q1

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        char[] cs = scan.next().toCharArray();
        for (int i = 0; i < n; i++) {
            cs[i] = (char) ('a' + ((cs[i] - 'a' - 3 + 26) % (26)));
        }
        System.out.println(new String(cs));
    }
}

Q2

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int t = scan.nextInt();
        while (t-- > 0){
            int n = scan.nextInt(), k = scan.nextInt();
            int ans, cnt = 0;
            for (int i = 0, j = 1; i < n; i++) {
                if (j == scan.nextInt()) {
                    cnt++;
                    j++;
                }
            }
            ans = (int) Math.ceil((n - cnt) * 1. / k);
            System.out.println(ans);
        }
    }
}

Q3

import java.util.Arrays;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        long[] nums = new long[n];
        for (int i = 0; i < n; i++) nums[i] = scan.nextLong();
        int m = scan.nextInt();
        int[] lefts = new int[m], rights = new int[m];
        char[] ops;
        long[] params = new long[m];
        for (int i = 0; i < m; i++) lefts[i] = scan.nextInt() - 1;
        for (int i = 0; i < m; i++) rights[i] = scan.nextInt() - 1;
        ops = scan.next().toCharArray();
        for (int i = 0; i < m; i++) params[i] = scan.nextLong();
        for (int i = 0; i < m; i++) {
            int l = lefts[i], r = rights[i];
            char op = ops[i];
            long p = params[i];
            if (op == '|') {
                for (int j = l; j <= r && j < n; j++) nums[j] |= p;
            } else if (op == '&') {
                for (int j = l; j <= r && j < n; j++) nums[j] &= p;
            } else if (op == '=') {
                for (int j = l; j <= r && j < n; j++) nums[j] = p;
            }
        }
        for (int i = 0; i < n; i++) System.out.print(nums[i] + " ");
    }
}