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Commit4be926f

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update a solution for 970
1 parent19e7a1b commit4be926f

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2 files changed

+63
-62
lines changed

2 files changed

+63
-62
lines changed

‎src/main/java/com/fishercoder/solutions/_970.java‎

Lines changed: 16 additions & 20 deletions
Original file line numberDiff line numberDiff line change
@@ -8,30 +8,26 @@
88

99
publicclass_970 {
1010
publicstaticclassSolution1 {
11-
/**
12-
* This approach results in Time Limit Exceeded since it's apparently doing
13-
* redundant checks.
14-
*/
1511
publicList<Integer>powerfulIntegers(intx,inty,intbound) {
16-
Set<Integer>result =newHashSet<>();
17-
intsmall =x;
18-
intbig =y;
19-
if (x >y) {
20-
small =y;
21-
big =x;
22-
}
23-
intmaxPower =bound /small;
24-
for (inti =0;i <=maxPower +1;i++) {
25-
for (intj =0;j <=maxPower +1;j++) {
26-
intsum = (int) (Math.pow(small,i) +Math.pow(big,j));
27-
if (sum <=bound) {
28-
result.add(sum);
12+
intpowerInteger;
13+
Set<Integer>set =newHashSet<>();
14+
for (inti =0;i <=bound;i++) {
15+
for (intj =0;j <=bound;j++) {
16+
powerInteger = (int) (Math.pow(x,i) +Math.pow(y,j));
17+
if (powerInteger <=bound) {
18+
set.add(powerInteger);
19+
}else {
20+
break;
21+
}
22+
if (y ==1) {
23+
break;
2924
}
3025
}
26+
if (x ==1) {
27+
break;
28+
}
3129
}
32-
List<Integer>list =newArrayList<>(result);
33-
Collections.sort(list);
34-
returnlist;
30+
returnnewArrayList<>(set);
3531
}
3632
}
3733

Lines changed: 47 additions & 42 deletions
Original file line numberDiff line numberDiff line change
@@ -1,55 +1,60 @@
11
packagecom.fishercoder;
22

3+
importcom.fishercoder.common.utils.CommonUtils;
34
importcom.fishercoder.solutions._970;
5+
46
importjava.util.Arrays;
57
importjava.util.Collections;
68
importjava.util.List;
9+
710
importorg.junit.BeforeClass;
811
importorg.junit.Test;
912

1013
importstaticorg.junit.Assert.assertEquals;
1114

1215
publicclass_970Test {
13-
privatestatic_970.Solution1solution1;
14-
privatestatic_970.Solution2solution2;
15-
16-
@BeforeClass
17-
publicstaticvoidsetup() {
18-
solution1 =new_970.Solution1();
19-
solution2 =new_970.Solution2();
20-
}
21-
22-
@Test
23-
publicvoidtest1() {
24-
assertEquals(Arrays.asList(2,3,4,5,7,9,10),solution1.powerfulIntegers(2,3,10));
25-
assertEquals(Arrays.asList(2,3,4,5,7,9,10),solution2.powerfulIntegers(2,3,10));
26-
}
27-
28-
@Test
29-
publicvoidtest2() {
30-
assertEquals(Arrays.asList(2,4,6,8,10,14),solution1.powerfulIntegers(3,5,15));
31-
assertEquals(Arrays.asList(2,4,6,8,10,14),solution2.powerfulIntegers(3,5,15));
32-
}
33-
34-
@Test
35-
publicvoidtest3() {
36-
assertEquals(Arrays.asList(2,3,5,7,8,9,10),solution1.powerfulIntegers(2,6,12));
37-
assertEquals(Arrays.asList(2,3,5,7,8,9,10),solution2.powerfulIntegers(2,6,12));
38-
}
39-
40-
@Test
41-
publicvoidtest4() {
42-
assertEquals(Arrays.asList(2,3,5,9,10,11),solution1.powerfulIntegers(2,9,12));
43-
assertEquals(Arrays.asList(2,3,5,9,10,11),solution2.powerfulIntegers(2,9,12));
44-
}
45-
46-
@Test
47-
publicvoidtest5() {
48-
assertEquals(Arrays.asList(2,91,180,8101,8190,16200,729001,729090,
49-
737100),solution1.powerfulIntegers(90,90,1000000));
50-
List<Integer>actual =solution2.powerfulIntegers(90,90,1000000);
51-
Collections.sort(actual);
52-
assertEquals(Arrays.asList(2,91,180,8101,8190,16200,729001,729090,
53-
737100),actual);
54-
}
16+
privatestatic_970.Solution1solution1;
17+
privatestatic_970.Solution2solution2;
18+
19+
@BeforeClass
20+
publicstaticvoidsetup() {
21+
solution1 =new_970.Solution1();
22+
solution2 =new_970.Solution2();
23+
}
24+
25+
@Test
26+
publicvoidtest1() {
27+
assertEquals(Arrays.asList(2,3,4,5,7,9,10),solution1.powerfulIntegers(2,3,10));
28+
assertEquals(Arrays.asList(2,3,4,5,7,9,10),solution2.powerfulIntegers(2,3,10));
29+
}
30+
31+
@Test
32+
publicvoidtest2() {
33+
assertEquals(Arrays.asList(2,4,6,8,10,14),solution1.powerfulIntegers(3,5,15));
34+
assertEquals(Arrays.asList(2,4,6,8,10,14),solution2.powerfulIntegers(3,5,15));
35+
}
36+
37+
@Test
38+
publicvoidtest3() {
39+
assertEquals(Arrays.asList(2,3,5,7,8,9,10),solution1.powerfulIntegers(2,6,12));
40+
assertEquals(Arrays.asList(2,3,5,7,8,9,10),solution2.powerfulIntegers(2,6,12));
41+
}
42+
43+
@Test
44+
publicvoidtest4() {
45+
assertEquals(Arrays.asList(2,3,5,9,10,11),solution1.powerfulIntegers(2,9,12));
46+
assertEquals(Arrays.asList(2,3,5,9,10,11),solution2.powerfulIntegers(2,9,12));
47+
}
48+
49+
@Test
50+
publicvoidtest5() {
51+
CommonUtils.printList(solution1.powerfulIntegers(90,90,1000000));
52+
CommonUtils.printList(solution2.powerfulIntegers(90,90,1000000));
53+
}
54+
55+
@Test
56+
publicvoidtest6() {
57+
assertEquals(Arrays.asList(2),solution1.powerfulIntegers(1,1,40000));
58+
assertEquals(Arrays.asList(2),solution2.powerfulIntegers(1,1,40000));
59+
}
5560
}

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