【第三天】蓝桥杯备战
题
- 1、成绩分析
- 2、合法日期
- 3、时间加法
- 4、扫雷
- 5、大写
- 6、标题统计
1、成绩分析
https://www.lanqiao.cn/problems/497/learning/
解法：暴力
import java.util.Scanner;
// 1:无需package
// 2: 类名必须Main, 不可修改
public class Test3 {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
//在此输入您的代码...
int n = scan.nextInt();
int i = 0;
int[] score = new int[n];
while(i < n) {
score[i] = scan.nextInt();
i++;
}
scan.close();
int maxScore = score[0];
int minScore = score[0];
int sum = 0;
for(int j = 0 ; j< n ; j++) {
if(score[j] > maxScore) {
maxScore = score[j];
}
if(score[j] < minScore) {
minScore = score[j];
}
sum += score[j];
}
System.out.println(maxScore);
System.out.println(minScore);
double ave = (double)sum / n;
System.out.printf("%.2f",ave);//是printf
}
}
注意：最后得到的平均值要保留两位小数，是double型，所以sum要强转为double型
2、合法日期
https://www.lanqiao.cn/problems/541/learning/
解法：暴力
import java.util.Scanner;
// 1:无需package
// 2: 类名必须Main, 不可修改
public class Main {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
//在此输入您的代码...
int m = scan.nextInt();
int d = scan.nextInt();
boolean ret = judge(m , d);
if(ret == true) {
System.out.println("yes");
}else {
System.out.println("no");
}
scan.close();
}
public static boolean judge(int m,int d) {
int[] data = {0,31 , 28 , 31 , 30, 31 , 30,31,31,30,31,30,31};
if(m > 12 || d > 31) {
return false;
}
if(data[m] < d) {
return false;
}
return true;
}
}
3、时间加法
https://www.lanqiao.cn/problems/548/learning/
解法：暴力
import java.util.Scanner;
// 1:无需package
// 2: 类名必须Main, 不可修改
public class Main {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
//在此输入您的代码...
int a = scan.nextInt();
int b = scan.nextInt();
int t = scan.nextInt();
b = b + t;
while(b >= 60) {
b = b - 60;
a = a + 1;
}
System.out.println(a);
System.out.println(b);
scan.close();
}
}
4、扫雷
https://www.lanqiao.cn/problems/549/learning/
解法：暴力
import java.util.Scanner;
// 1:无需package
// 2: 类名必须Main, 不可修改
public class Main {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
//在此输入您的代码...
int n = scan.nextInt();
int m = scan.nextInt();
int[][] array = new int[n+2][m+2];
int[][] result = new int[n+2][m+2];
for(int i = 1 ; i <= n ; i++) {
for(int j = 1 ;j <= m ; j++) {
array[i][j] = scan.nextInt();
}
}
for(int i = 1 ; i<= n ; i++) {
for(int j = 1 ; j <= m ; j++) {
if(array[i][j] == 1) {
System.out.print("9" + " ");
}else {
result[i][j] = array[i-1][j-1] + array[i-1][j] + array[i-1][j+1] +array[i][j-1] + array[i][j+1]
+array[i+1][j-1] + array[i+1][j] + array[i+1][j+1];
System.out.print(result[i][j] + " ");
}
}
System.out.println();
}
scan.close();
}
}
5、大写
https://www.lanqiao.cn/problems/1590/learning/
解法：运用字符串方法
import java.util.Scanner;
// 1:无需package
// 2: 类名必须Main, 不可修改
public class Main {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
//在此输入您的代码...
String str = scan.nextLine();
System.out.println(str.toUpperCase());
scan.close();
}
}
6、标题统计
https://www.lanqiao.cn/problems/325/learning/
解法：暴力
import java.util.Scanner;
// 1:无需package
// 2: 类名必须Main, 不可修改
public class Main {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
//在此输入您的代码...
String str = scan.nextLine();
int count = 0 ;
for(int i = 0 ; i < str.length(); i++) {
char ch = str.charAt(i);
if(ch != ' ' && ch != '\n') {
count++;
}
}
System.out.println(count);
scan.close();
}
}