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July 28, 2012 19:49
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第2回 オフラインリアルタイムどう書く: Java解答
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package yhpg2; | |
import static org.junit.Assert.assertEquals; | |
import java.util.*; | |
import org.junit.Test; | |
/** | |
* 問題: http://nabetani.sakura.ne.jp/hena/ord2/ | |
*/ | |
public class BitTetris { | |
String execute(String input) { | |
String[] split = input.split("-"); | |
String[] cols = getCols(split); | |
String[] rows = _tr(cols); | |
List<Integer> deleteIndexes = getDeleteIndexes(rows); | |
String[] deleted = getDeleted(rows, deleteIndexes); | |
String[] result = new String[deleted.length]; | |
result = _tr(deleted); | |
result = _tr(result); | |
result = _tr(result); | |
String resultStr = getResultStr(result); | |
return resultStr; | |
} | |
String toData(String hexStr) { | |
String binStr = Integer.toBinaryString(Integer.parseInt(hexStr, 16)); | |
Formatter f = new Formatter(); | |
f.format("%04d", Integer.parseInt(binStr)); | |
return f.toString(); | |
} | |
String[] getDeleted(String[] rows, List<Integer> deleteRowList) { | |
String[] clone = new String[rows.length + 1]; | |
for (int i = 0; i < rows.length; i++) { | |
clone[i] = rows[i]; | |
} | |
clone[clone.length - 1] = "00000000"; | |
String[] tmp = new String[rows.length - deleteRowList.size()]; | |
int cnt = 0; | |
for (int i : deleteRowList) { | |
for (int k = i - cnt; k < rows.length; k++) { | |
clone[k] = clone[k + 1]; | |
} | |
cnt++; | |
} | |
for (int i = 0; i < tmp.length; i++) { | |
tmp[i] = clone[i]; | |
} | |
return tmp; | |
} | |
boolean canDelete(String row) { | |
if (row.indexOf("0") == -1) { | |
return true; | |
} | |
return false; | |
} | |
String getResultStr(String[] result) { | |
StringBuilder sb = new StringBuilder(); | |
for (int i = 0; i < result.length; i++) { | |
Formatter f = new Formatter(); | |
f.format("%08d", Integer.parseInt(result[i])); | |
String string = f.toString(); | |
sb.append(Integer.toHexString(Integer.valueOf( | |
string.substring(0, 4), 2))); | |
sb.append(Integer.toHexString(Integer.valueOf( | |
string.substring(4, 8), 2))); | |
sb.append("-"); | |
} | |
sb.deleteCharAt(sb.length() - 1); | |
return new String(sb); | |
} | |
String[] getCols(String[] split) { | |
String[] result = new String[split.length]; | |
for (int i = 0; i < split.length; i++) { | |
String data = ""; | |
for (int k = 0; k < 2; k++) { | |
data += toData(String.valueOf(split[i].charAt(k))); | |
} | |
result[i] = data; | |
} | |
return result; | |
} | |
List<Integer> getDeleteIndexes(String[] rows) { | |
List<Integer> result = new ArrayList<>(); | |
for (int i = 0; i < rows.length; i++) { | |
if (canDelete(rows[i])) { | |
result.add(i); | |
} | |
} | |
return result; | |
} | |
String[] _tr(String[] str) { | |
String[] result = new String[str[0].length()]; | |
for (int i = 0; i < result.length; i++) { | |
for (int k = 0; k < str.length; k++) { | |
if (result[i] == null) { | |
result[i] = String.valueOf(str[k].charAt(i)); | |
} else { | |
String s = result[i]; | |
result[i] = s + String.valueOf(str[k].charAt(i)); | |
} | |
} | |
} | |
return result; | |
} | |
public static void main(String[] args) { | |
BitTetris tet = new BitTetris(); | |
System.out.println(tet.execute("ff-2f-23-f3-77-7f-3b")); | |
} | |
@Test | |
public void testExecute() throws Exception { | |
BitTetris tet = new BitTetris(); | |
assertEquals("1f-03-00-1c-0d-0f-06", | |
tet.execute("ff-2f-23-f3-77-7f-3b")); | |
assertEquals("00", tet.execute("01")); | |
assertEquals("00", tet.execute("00")); | |
assertEquals("0c-02", tet.execute("7a-4e")); | |
assertEquals("08-14", tet.execute("56-b6")); | |
assertEquals("00-00-00", tet.execute("12-12-12")); | |
assertEquals("0a-0f-05", tet.execute("de-ff-7b")); | |
assertEquals("05-1e-20", tet.execute("95-be-d0")); | |
assertEquals("1c-20-2b", tet.execute("7c-b0-bb")); | |
assertEquals("3a-56-11-2a", tet.execute("7a-b6-31-6a")); | |
assertEquals("18-06-11-40", tet.execute("32-0e-23-82")); | |
assertEquals("0f-07-0b-0d-0e", tet.execute("ff-7f-bf-df-ef")); | |
assertEquals("35-5f-5c-2e-02", tet.execute("75-df-dc-6e-42")); | |
assertEquals("22-11-6f-47-78", tet.execute("62-51-ef-c7-f8")); | |
assertEquals("04-23-46-6d-2d-0b", tet.execute("0c-47-8e-dd-5d-17")); | |
assertEquals("52-28-2b-35-4f-0f", tet.execute("aa-58-5b-6d-9f-1f")); | |
assertEquals("0f-00-08-04-02-01", tet.execute("ff-55-d5-75-5d-57")); | |
assertEquals("7e-7d-7b-77-6f-5f-3f", | |
tet.execute("fe-fd-fb-f7-ef-df-bf")); | |
assertEquals("7e-7d-7b-77-6f-5f-3f", | |
tet.execute("fd-fb-f7-ef-df-bf-7f")); | |
assertEquals("69-05-55-67-0b-4f-6e", | |
tet.execute("d9-15-b5-d7-1b-9f-de")); | |
assertEquals("18-05-7d-20-00-46-5a", | |
tet.execute("38-15-fd-50-10-96-ba")); | |
assertEquals("fe-fd-fb-f7-ef-df-bf-7f", | |
tet.execute("fe-fd-fb-f7-ef-df-bf-7f")); | |
} | |
} |
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