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Commit10875dd

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add a solution for 1087
1 parent81cb7fe commit10875dd

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2 files changed

+53
-2
lines changed

2 files changed

+53
-2
lines changed

‎src/main/java/com/fishercoder/solutions/_1087.java

Lines changed: 48 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -2,12 +2,13 @@
22

33
importjava.util.ArrayList;
44
importjava.util.Arrays;
5+
importjava.util.Collections;
56
importjava.util.List;
67

78
publicclass_1087 {
89
publicstaticclassSolution1 {
9-
publicString[]expand(StringS) {
10-
List<char[]>letters =parse(S);
10+
publicString[]expand(Strings) {
11+
List<char[]>letters =parse(s);
1112
List<String>result =backtracking(letters,0,newStringBuilder(),newArrayList<>());
1213
String[]r =result.stream().toArray(String[]::new);
1314
Arrays.sort(r);
@@ -51,4 +52,49 @@ private List<char[]> parse(String s) {
5152
returnresult;
5253
}
5354
}
55+
56+
publicstaticclassSolution2 {
57+
/**
58+
* My completely original solution on 1/17/2022.
59+
*/
60+
publicString[]expand(Strings) {
61+
List<String>list =newArrayList<>();
62+
list.add("");
63+
for (inti =0;i <s.length();i++) {
64+
List<String>newList =newArrayList<>();
65+
if (s.charAt(i) =='{') {
66+
intj =i +1;
67+
while (s.charAt(j) !='}') {
68+
j++;
69+
}
70+
Strings2 =s.substring(i +1,j);
71+
String[]chars =s2.split("\\,");
72+
for (Stringc :chars) {
73+
for (Stringsb :list) {
74+
sb +=c;
75+
newList.add(sb);
76+
}
77+
}
78+
i =j;
79+
}else {
80+
for (Stringsb :list) {
81+
sb +=s.charAt(i);
82+
newList.add(sb);
83+
}
84+
}
85+
list.clear();
86+
list.addAll(newList);
87+
}
88+
List<String>res =newArrayList<>();
89+
for (Stringsb :list) {
90+
res.add(sb);
91+
}
92+
Collections.sort(res);
93+
String[]ans =newString[res.size()];
94+
for (inti =0;i <res.size();i++) {
95+
ans[i] =res.get(i);
96+
}
97+
returnans;
98+
}
99+
}
54100
}

‎src/test/java/com/fishercoder/_1087Test.java

Lines changed: 5 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -8,25 +8,30 @@
88

99
publicclass_1087Test {
1010
privatestatic_1087.Solution1solution1;
11+
privatestatic_1087.Solution2solution2;
1112

1213
@BeforeClass
1314
publicstaticvoidsetup() {
1415
solution1 =new_1087.Solution1();
16+
solution2 =new_1087.Solution2();
1517
}
1618

1719
@Test
1820
publicvoidtest1() {
1921
assertArrayEquals(newString[]{"ade","adf","bde","bdf","cde","cdf"},solution1.expand("{a,b,c}d{e,f}"));
22+
assertArrayEquals(newString[]{"ade","adf","bde","bdf","cde","cdf"},solution2.expand("{a,b,c}d{e,f}"));
2023
}
2124

2225
@Test
2326
publicvoidtest2() {
2427
assertArrayEquals(newString[]{"abcd"},solution1.expand("abcd"));
28+
assertArrayEquals(newString[]{"abcd"},solution2.expand("abcd"));
2529
}
2630

2731
@Test
2832
publicvoidtest3() {
2933
assertArrayEquals(newString[]{"acdf","acef","bcdf","bcef"},solution1.expand("{a,b}c{d,e}f"));
34+
assertArrayEquals(newString[]{"acdf","acef","bcdf","bcef"},solution2.expand("{a,b}c{d,e}f"));
3035
}
3136

3237
}

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