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蓝桥杯复习知识点汇总

import java.io.*;
import java.math.BigInteger;
import java.util.*;/*** @Author DragonOne* @Date 2021/12/5 21:27* @墨水记忆 www.tothefor.com*/
public class Main {public static BufferedReader in = new BufferedReader(new InputStreamReader(System.in));public static BufferedWriter out = new BufferedWriter(new OutputStreamWriter(System.out));public static StreamTokenizer cin = new StreamTokenizer(new BufferedReader(new InputStreamReader(System.in)));public static PrintWriter cout = new PrintWriter(new OutputStreamWriter(System.out));public static Scanner sc = new Scanner(System.in);public static int monthes[]= {0,31,28,31,30,31,30,31,31,30,31,30,31};//一年中的12个月每月的天数public static int maxd = 1000+7;public static int INF = 0x3f3f3f3f;public static int mod = 998244353;public static int[][] a = new int[maxd][maxd];public static int[][] b = new int[maxd][maxd];public static void main(String[] args) throws Exception {int n = nextInt(); //行int m = nextInt(); //列for(int i=0;i<n;++i){for(int j=0;j<m;++j){a[i][j]=nextInt();}}//旋转后为m行n列for(int i=0;i<m;++i){ //行for(int j=0;j<n;++j){ //列b[i][j]=a[n-1-j][i];}}for(int i=0;i<m;++i){for(int j=0;j<n;++j){System.out.print(b[i][j]+" ");}System.out.println();}closeAll();}public static int gcd(int a,int b){ // 不需要判断a和b的大小while(b>0){a%=b;b^=a;a^=b;b^=a;
//           while(b^=a^=b^=a%=b);}return a;
//        return (a % b == 0) ? b : gcd(b, a%b);}public static void cinInit(){cin.wordChars('a', 'z');cin.wordChars('A', 'Z');cin.wordChars(128 + 32, 255);cin.whitespaceChars(0, ' ');cin.commentChar('/');cin.quoteChar('"');cin.quoteChar('\'');cin.parseNumbers(); //可单独使用还原数字}public static int nextInt() throws Exception {cin.nextToken();return (int) cin.nval;}public static long nextLong() throws Exception {cin.nextToken();return (long) cin.nval;}public static double nextDouble() throws Exception {cin.nextToken();return cin.nval;}public static String nextString() throws Exception {cin.nextToken();return cin.sval;}public static void closeAll() throws Exception {cout.close();in.close();out.close();}
}

180°

import java.io.*;
import java.math.BigInteger;
import java.util.*;/*** @Author DragonOne* @Date 2021/12/5 21:27* @墨水记忆 www.tothefor.com*/
public class Main {public static BufferedReader in = new BufferedReader(new InputStreamReader(System.in));public static BufferedWriter out = new BufferedWriter(new OutputStreamWriter(System.out));public static StreamTokenizer cin = new StreamTokenizer(new BufferedReader(new InputStreamReader(System.in)));public static PrintWriter cout = new PrintWriter(new OutputStreamWriter(System.out));public static Scanner sc = new Scanner(System.in);public static int monthes[]= {0,31,28,31,30,31,30,31,31,30,31,30,31};//一年中的12个月每月的天数public static int maxd = 1000+7;public static int INF = 0x3f3f3f3f;public static int mod = 998244353;public static int[][] a = new int[maxd][maxd];public static int[][] b = new int[maxd][maxd];public static void main(String[] args) throws Exception {int n = nextInt(); //行int m = nextInt(); //列for(int i=0;i<n;++i){for(int j=0;j<m;++j){a[i][j]=nextInt();}}//旋转后还是为 n行 m列for(int i=0;i<n;++i){ //行for(int j=0;j<m;++j){ //列b[i][j]=a[n-1-i][m-1-j];}}for(int i=0;i<n;++i){for(int j=0;j<m;++j){System.out.print(b[i][j]+" ");}System.out.println();}closeAll();}public static int gcd(int a,int b){ // 不需要判断a和b的大小while(b>0){a%=b;b^=a;a^=b;b^=a;
//           while(b^=a^=b^=a%=b);}return a;
//        return (a % b == 0) ? b : gcd(b, a%b);}public static void cinInit(){cin.wordChars('a', 'z');cin.wordChars('A', 'Z');cin.wordChars(128 + 32, 255);cin.whitespaceChars(0, ' ');cin.commentChar('/');cin.quoteChar('"');cin.quoteChar('\'');cin.parseNumbers(); //可单独使用还原数字}public static int nextInt() throws Exception {cin.nextToken();return (int) cin.nval;}public static long nextLong() throws Exception {cin.nextToken();return (long) cin.nval;}public static double nextDouble() throws Exception {cin.nextToken();return cin.nval;}public static String nextString() throws Exception {cin.nextToken();return cin.sval;}public static void closeAll() throws Exception {cout.close();in.close();out.close();}
}

270°

import java.io.*;
import java.math.BigInteger;
import java.util.*;/*** @Author DragonOne* @Date 2021/12/5 21:27* @墨水记忆 www.tothefor.com*/
public class Main {public static BufferedReader in = new BufferedReader(new InputStreamReader(System.in));public static BufferedWriter out = new BufferedWriter(new OutputStreamWriter(System.out));public static StreamTokenizer cin = new StreamTokenizer(new BufferedReader(new InputStreamReader(System.in)));public static PrintWriter cout = new PrintWriter(new OutputStreamWriter(System.out));public static Scanner sc = new Scanner(System.in);public static int monthes[]= {0,31,28,31,30,31,30,31,31,30,31,30,31};//一年中的12个月每月的天数public static int maxd = 1000+7;public static int INF = 0x3f3f3f3f;public static int mod = 998244353;public static int[][] a = new int[maxd][maxd];public static int[][] b = new int[maxd][maxd];public static void main(String[] args) throws Exception {int n = nextInt(); //行int m = nextInt(); //列for(int i=0;i<n;++i){for(int j=0;j<m;++j){a[i][j]=nextInt();}}//旋转后为 m行 n列for(int i=0;i<m;++i){ //行for(int j=0;j<n;++j){ //列b[i][j]=a[j][m-1-i];}}for(int i=0;i<m;++i){for(int j=0;j<n;++j){System.out.print(b[i][j]+" ");}System.out.println();}closeAll();}public static int gcd(int a,int b){ // 不需要判断a和b的大小while(b>0){a%=b;b^=a;a^=b;b^=a;//           while(b^=a^=b^=a%=b);}return a;//        return (a % b == 0) ? b : gcd(b, a%b);}public static void cinInit(){cin.wordChars('a', 'z');cin.wordChars('A', 'Z');cin.wordChars(128 + 32, 255);cin.whitespaceChars(0, ' ');cin.commentChar('/');cin.quoteChar('"');cin.quoteChar('\'');cin.parseNumbers(); //可单独使用还原数字}public static int nextInt() throws Exception {cin.nextToken();return (int) cin.nval;}public static long nextLong() throws Exception {cin.nextToken();return (long) cin.nval;}public static double nextDouble() throws Exception {cin.nextToken();return cin.nval;}public static String nextString() throws Exception {cin.nextToken();return cin.sval;}public static void closeAll() throws Exception {cout.close();in.close();out.close();}
}

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蓝桥杯JAVA-32.二维数组（矩阵）实现旋转模板（JAVA实现）

目录

顺时针旋转

90°

180°

270°

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