这道题还好,不复杂,uva直接ac,思路:
固定上下2个面(共6种情况),中间4个面按照前左后又的顺序排(共4种情况),1个立方体的所有排序种类共4*6=24种,放到ArrayList中.然后看ArrayList中是否包要查的情况,包含输出TRUE,否则输出FALSE.
The input of your program is a textfile that ends with the standard end-of-file marker. java里判断是否eof结尾,用hasNext
import java.util.ArrayList;
import java.util.Scanner;
public class Main {
static int[][] arr = {{0,1,2,4,3,5},{1,5,2,0,3,4},{2,1,5,4,0,3},{3,1,0,4,5,2},{4,0,2,5,3,1},{5,4,2,1,3,0}};
public static void main(String[] args) {
//输入数据
Scanner sc = new Scanner(System.in);
while (sc.hasNextLine()){
String str = sc.nextLine();
//调用判断函数
isTrue(str);
}
}
private static void isTrue(String str) {
String str1 = str.substring(0,6);
String str2 = str.substring(6);
ArrayList<String> list = new ArrayList<>();
for (int i = 0; i < 6; i++) {
get4(list,str1,arr[i]);
}
String str3 = str2.substring(0,3)+str2.charAt(4)+str2.charAt(3)+str2.charAt(5);
if(list.contains(str3)) System.out.println("TRUE");
else System.out.println("FALSE");
}
//上下面固定,获取中间4种情况
private static void get4(ArrayList<String> list,String str,int[] arr1){
int[] arr2 = {arr1[1],arr1[2],arr1[3],arr1[4],};
for (int i = 0; i < 4; i++) {
StringBuilder sb = new StringBuilder();
sb.append(str.charAt(arr1[0]));
for (int index = 0; index < 4; index++) {
sb.append(str.charAt(arr2[(index+i)%4]));
}
sb.append(str.charAt(arr1[5]));
list.add(sb.toString());
}
}
}
/*
We have a machine for painting cubes. It is supplied with three
different colors: blue, red and green. Each face of the cube gets one
of these colors. The cube’s faces are numbered as in Figure 1.
Since a cube has 6 faces, our machine can paint a face-numbered
cube in 3
6 = 729 different ways. When ignoring the face-numbers,
the number of different paintings is much less, because a cube can
be rotated. See example below.
We denote a painted cube by a string of 6 characters, where each
character is a ‘b’, ‘r’, or ‘g’. The i-th character (1 ≤ i ≤ 6) from the
left gives the color of face i. For example, Figure 2 is a picture of
“rbgggr” and Figure 3 corresponds to “rggbgr”. Notice that both
cubes are painted in the same way: by rotating it around the vertical
axis by 90°, the one changes into the other.
Figure 2 Figure 3
Input
The input of your program is a textfile that ends with the standard end-of-file marker. Each line is a
string of 12 characters. The first 6 characters of this string are the representation of a painted cube, the
remaining 6 characters give you the representation of another cube. Your program determines whether
these two cubes are painted in the same way, that is, whether by any combination of rotations one can
be turned into the other. (Reflections are not allowed.)
Output
The output is a file of boolean. For each line of input, output contains ‘TRUE’ if the second half can be
obtained from the first half by rotation as describes above, ‘FALSE’ otherwise.
Sample Input
rbgggrrggbgr
rrrbbbrrbbbr
rbgrbgrrrrrg
Sample Output
TRUE
FALSE
FALSE
udebug测试数据
E:\develop\Java\jdk1.8\bin\java -javaagent:C:\develop\IntelliJIDEA2017.3.2\lib\idea_rt.jar=8376:C:\develop\IntelliJIDEA2017.3.2\bin -Dfile.encoding=UTF-8 -classpath E:\develop\Java\jdk1.8\jre\lib\charsets.jar;E:\develop\Java\jdk1.8\jre\lib\deploy.jar;E:\develop\Java\jdk1.8\jre\lib\ext\access-bridge-64.jar;E:\develop\Java\jdk1.8\jre\lib\ext\cldrdata.jar;E:\develop\Java\jdk1.8\jre\lib\ext\dnsns.jar;E:\develop\Java\jdk1.8\jre\lib\ext\jaccess.jar;E:\develop\Java\jdk1.8\jre\lib\ext\jfxrt.jar;E:\develop\Java\jdk1.8\jre\lib\ext\localedata.jar;E:\develop\Java\jdk1.8\jre\lib\ext\nashorn.jar;E:\develop\Java\jdk1.8\jre\lib\ext\sunec.jar;E:\develop\Java\jdk1.8\jre\lib\ext\sunjce_provider.jar;E:\develop\Java\jdk1.8\jre\lib\ext\sunmscapi.jar;E:\develop\Java\jdk1.8\jre\lib\ext\sunpkcs11.jar;E:\develop\Java\jdk1.8\jre\lib\ext\zipfs.jar;E:\develop\Java\jdk1.8\jre\lib\javaws.jar;E:\develop\Java\jdk1.8\jre\lib\jce.jar;E:\develop\Java\jdk1.8\jre\lib\jfr.jar;E:\develop\Java\jdk1.8\jre\lib\jfxswt.jar;E:\develop\Java\jdk1.8\jre\lib\jsse.jar;E:\develop\Java\jdk1.8\jre\lib\management-agent.jar;E:\develop\Java\jdk1.8\jre\lib\plugin.jar;E:\develop\Java\jdk1.8\jre\lib\resources.jar;E:\develop\Java\jdk1.8\jre\lib\rt.jar;E:\code\IdeaProjects\dashuju1\out\production\suanfa com.uva.CubePainting
gbgggbgbgbgg
bgbgbbbbgbbg
bbbggrrgbbgb
ggrbgrgbgrrg
ggbgrrgrbrgg
grbrrgrggrbr
gbrbgrbgrgbr
brrrgbrbgbrr
brgggbbggrbg
ggrggrrgggrg
brgbgbbbrggb
bbggrrgrbbrg
rrrrggrgrrgr
grgrbrgrgbrr
rrgggrrrrggg
grrrrrrrrrrg
gggrrbrrgbgg
bbgrbgbrgbgb
rrbrbrbrbrrr
gbgrrrgrrrbg
rbrrbbbrrbrb
rrbrgrrrgrrb
brbbrgbrrbbg
gbrbbrrrgbbb
rbrrrgrbrrgr
bgrrgbggrrbb
rgrrbbrrbbrg
gbbgbrrbbgbg
rbgbbbbrbbgb
rgbgrgrgrgbg
grgrrgggrrrg
rgrgrbrggrrb
rgbgrbgrgrbb
rrrbrgrrrrgb
gggbbbgbggbb
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*/