回答編集履歴
3
BitSetを使った例に変更
test
CHANGED
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@@ -1,38 +1,4 @@
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1
1
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番外編？ List系使わず、要素数も限られるけど、ビット演算で簡単に・・・
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2
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-
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3
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5
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-
```java
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class Main {
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public static void main(String[] args) {
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String s[] = {"あ", "い", "う", "え", "お"};
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var bit = (1 << Integer.parseInt(args[0]))
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| (1 << Integer.parseInt(args[1]));
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for (var e: s) {
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if ((bit & 1) == 0) System.out.println(e);
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-
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bit >>= 1;
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-
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}
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-
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}
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-
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}
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-
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```
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32
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-
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33
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-
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34
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-
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35
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無理矢理 stream使ってみたり・・・
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36
2
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37
3
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38
4
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@@ -50,13 +16,15 @@
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16
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var bit = new java.util.BitSet();
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20
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+
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53
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-
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21
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Arrays.stream(args).mapToInt(Integer::parseInt).forEach(bit::set);
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var i = 0;
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54
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for (var e: s) {
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57
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if (
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if (!bit.get(i++)) System.out.println(e);
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58
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-
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59
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bit >>= 1;
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60
28
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}
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30
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@@ -65,3 +33,41 @@
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65
33
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}
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66
34
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67
35
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```
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36
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+
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37
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+
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38
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39
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BitSetを使って制限解除。
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40
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41
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42
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43
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```java
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44
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45
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import java.util.Arrays;
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46
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47
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48
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49
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class Main {
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50
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51
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public static void main(String[] args) {
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52
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53
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String s[] = {"あ", "い", "う", "え", "お"};
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54
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55
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56
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57
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var bit = new java.util.BitSet();
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58
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59
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Arrays.stream(args).mapToInt(Integer::parseInt).forEach(bit::set);
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60
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61
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var i = 0;
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62
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63
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for (var e: s) {
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64
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65
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if (!bit.get(i++)) System.out.println(e);
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66
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67
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}
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68
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+
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69
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}
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70
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71
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}
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72
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73
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```
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2
stream版追記
test
CHANGED
|
@@ -1,4 +1,4 @@
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1
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-
番外編？ List系使わず、要素数も限られるけど、ビット演算で・・・
|
|
1
|
+
番外編？ List系使わず、要素数も限られるけど、ビット演算で簡単に・・・
|
|
2
2
|
|
|
3
3
|
|
|
4
4
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|
|
@@ -29,3 +29,39 @@
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29
29
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}
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30
30
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|
31
31
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```
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32
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+
|
|
33
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+
|
|
34
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+
|
|
35
|
+
無理矢理 stream使ってみたり・・・
|
|
36
|
+
|
|
37
|
+
|
|
38
|
+
|
|
39
|
+
```java
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40
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+
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|
41
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+
import java.util.Arrays;
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42
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+
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43
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+
|
|
44
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+
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|
45
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+
class Main {
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|
46
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+
|
|
47
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+
public static void main(String[] args) {
|
|
48
|
+
|
|
49
|
+
String s[] = {"あ", "い", "う", "え", "お"};
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|
50
|
+
|
|
51
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+
|
|
52
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+
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|
53
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+
var bit = Arrays.stream(args).mapToInt(x -> 1<<Integer.parseInt(x)).sum();
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|
54
|
+
|
|
55
|
+
for (var e: s) {
|
|
56
|
+
|
|
57
|
+
if ((bit & 1) == 0) System.out.println(e);
|
|
58
|
+
|
|
59
|
+
bit >>= 1;
|
|
60
|
+
|
|
61
|
+
}
|
|
62
|
+
|
|
63
|
+
}
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|
64
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+
|
|
65
|
+
}
|
|
66
|
+
|
|
67
|
+
```
|
1
説明変更
test
CHANGED
|
@@ -1,4 +1,4 @@
|
|
|
1
|
-
要素数
|
|
1
|
+
番外編？ List系使わず、要素数も限られるけど、ビット演算で・・・
|
|
2
2
|
|
|
3
3
|
|
|
4
4
|
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