第十一届蓝桥杯省赛JavaC组真题——详细答案对照(完整版)

package action;

import java.math.BigInteger;

public class demo {
	public static void main(String[] args) {
		BigInteger x = new BigInteger("7");
		BigInteger y = new BigInteger("1921");
		BigInteger z = x.pow(2020).remainder(y);
		System.out.println(z);
	}
}

package action;

import java.math.BigInteger;
import java.util.HashMap;
import java.util.Scanner;

public class demo {
	public static void main(String[] args) {
		HashMap<Character, Character> coadMap = new HashMap<Character, Character>();
		Scanner sc = new Scanner(System.in);
		// 将52组密码输入并且存入Map中
		for (int i = 0; i < 52; i++) {
			char c = sc.next().trim().charAt(0);
			char tc = sc.next().trim().charAt(0);
			coadMap.put(tc , c); //解密的
		}
		String str = sc.next(); // 输入要转换的密码字符串
		char [] ch = str.toCharArray(); // 将字符串转换成字符数组
		// 通过循环将每个字符进行转换
		for (char c : ch) {
			System.out.print(coadMap.get(c));
		}
	}
}

a    y    n    l    A    Y    N    L
b    x    o    g    B    X    O    G
c    m    p    o    C    M    P    O
d    d    q    u    D    D    Q    U
e    a    r    f    E    A    R    F
f    c    s    s    F    C    S    S
g    i    t    z    G    I    T    Z
h    k    u    p    H    K    U    P
i    n    v    w    I    N    V    W
j    t    w    b    J    T    W    B
k    j    x    r    K    J    X    R
l    h    y    e    L    H    Y    E
m    q    z    v    M    Q    Z    V
EaFnjISplhFviDhwFbEjRjfIBBkRyY

package action;

public class demo {
	public static void main(String[] args) {
		int start = 10000;
		boolean f = true;//用来判断状态
		int min = 0;
		while (true) {
			//结束条件
			if (start < 600 && f) {
				break;
			}
			if (f) {
				start -= 600;
				f = false;
			} else {
				start += 300;
				f = true;
			}
			min++;
		}
		int y = min * 60 + (start / 10);
		System.out.println(y);
	}
}

package action;

public class demo {
	public static void main(String[] args) {
		int allPerson = 999;//人数
		int num = 0; //试剂盒个数
		int minx = 9999999; //试剂盒最少个数
		int answer = 0;
		for (int k = 1; k <= allPerson; k++) {
			if (allPerson % k == 0) {
				num = (allPerson / k) + (int) Math.floor(0.01 * allPerson) * k;
			} else {
				num = (allPerson / k) + (int) Math.floor(0.01 * allPerson) * k + 1;
			}
			if (num < minx) {
				minx = num;
				answer = k;
			}
		}
		System.out.println(answer);
	}
}

package action;

public class demo {
	public static void main(String[] args) {
		int A = 0;
		for (int i = 0; i < 2; i++) {
			A += 4;
			for (int j = 0; j < 5; j++) {
				for (int k = 0; k < 6; k++) {
					A += 5;
				}
				A += 7;
			}
			A += 8;
		}
		A += 9;
		System.out.println(A);
	}
}

package action;

import java.util.Scanner;

public class demo {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String str = sc.next();
		char[] ch = str.toCharArray();
		int[] num = new int[3];
		for (int i = 0; i < ch.length; i++) {
			if (ch[i] >= '0' && ch[i] <= '9') {
				num[2]++;
			} else if (ch[i] >= 'a' && ch[i] <= 'z') {
				num[1]++;
			} else if (ch[i] >= 'A' && ch[i] <= 'Z') {
				num[0]++;
			}
		}
		for (int i : num) {
			System.out.println(i);
		}
	}
}

package action;

import java.util.Scanner;

public class demo {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		while (n > 0) {
			System.out.print(n + " ");
			n /= 2;
		}
	}
}

package action;

import java.util.Scanner;

public class demo {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		int[][] dp = new int[n + 1][m + 1];
		for (int i = 1; i <= n; i++) {
			dp[i][1] = 1;
		}
		for (int i = 1; i <= m; i++) {
			dp[1][i] = 1;
		}
		for (int i = 2; i <= n; i++) {
			for (int j = 2; j <= m; j++) {
				if (i % 2 == 0 && j % 2 == 0)
					continue;
				else
					dp[i][j] = dp[i - 1][j] + dp[i][j - 1];
			}
		}
		System.out.println(dp[n][m]);
	}
}

package action;

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class demo {
	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		char[] c = input.next().toCharArray();
		input.close();
		int n = c.length;
		List<String> list = new ArrayList<>();
		int i = 0;
		while (i < n) {
			if (c[i] == '0') {
				i++;
				continue;
			}
			if (i + 1 < n) {
				int a = Integer.parseInt("" + c[i] + c[i + 1]);
				if (a < 27) {
					list.add("" + (char) (a + 'A' - 1));
					i += 2;
				} else {
					list.add("" + (char) (Integer.parseInt(c[i] + "") + 'A' - 1));
					i++;
				}
			} else {
				list.add("" + (char) (Integer.parseInt(c[i] + "") + 'A' - 1));
				i++;
			}
		}
		for (int k = 0; k < list.size(); k++) {
			System.out.print(list.get(k));
		}
	}
}

package action;

import java.util.Scanner;

public class demo {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int K = sc.nextInt();
		int[] arr = new int[n + 1];

		for (int i = 1; i < arr.length; i++) {
			arr[i] = sc.nextInt();
		}
		int count = 0;
		for (int i = 1; i < arr.length - 1; i++) {
			for (int j = i + 1; j < arr.length; j++) {
				if (i == j) {
					continue;
				}
				if (arr[i] >= 100) {
					break;
				}
				int x = 0;
				if (arr[i] / 10 == 0) {
					x = 1;
				} else {
					x = 2;
				}
				int y = 0;
				if (arr[j] / 10 == 0) {
					y = 1;
				} else {
					y = 2;
				}
				if (arr[i] * Math.pow(10, y) + arr[j] <= K) {
					count++;
				}
				if (arr[j] * Math.pow(10, x) + arr[i] <= K) {
					count++;
				}
			}
		}
		System.out.println(count);
	}
}

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