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Commitb9a4202

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add a solution for 997
1 parent99a181b commitb9a4202

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2 files changed

+71
-46
lines changed

2 files changed

+71
-46
lines changed

‎src/main/java/com/fishercoder/solutions/_997.java

Lines changed: 25 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -5,20 +5,42 @@
55

66
publicclass_997 {
77
publicstaticclassSolution1 {
8-
publicintfindJudge(intN,int[][]trust) {
9-
int[]trustPoints =newint[N];
8+
publicintfindJudge(intn,int[][]trust) {
9+
int[]trustPoints =newint[n];
1010
Set<Integer>trustOthers =newHashSet<>();
1111
for (int[]eachTrust :trust) {
1212
trustPoints[eachTrust[1] -1]++;
1313
trustOthers.add(eachTrust[0]);
1414
}
1515
intjudge = -1;
1616
for (inti =0;i <trustPoints.length;i++) {
17-
if (trustPoints[i] ==N -1 && !trustOthers.contains(i +1)) {
17+
if (trustPoints[i] ==n -1 && !trustOthers.contains(i +1)) {
1818
judge =i +1;
1919
}
2020
}
2121
returnjudge;
2222
}
2323
}
24+
25+
publicstaticclassSolution2 {
26+
/**
27+
* Credit: https://leetcode.com/problems/find-the-town-judge/solution/ solution 2
28+
*/
29+
publicintfindJudge(intn,int[][]trust) {
30+
if (trust.length <n -1) {
31+
return -1;
32+
}
33+
int[]trustScores =newint[n];
34+
for (int[]t :trust) {
35+
trustScores[t[1] -1]++;
36+
trustScores[t[0] -1]--;
37+
}
38+
for (inti =0;i <n;i++) {
39+
if (trustScores[i] ==n -1) {
40+
returni +1;
41+
}
42+
}
43+
return -1;
44+
}
45+
}
2446
}

‎src/test/java/com/fishercoder/_997Test.java

Lines changed: 46 additions & 43 deletions
Original file line numberDiff line numberDiff line change
@@ -7,47 +7,50 @@
77
importstaticorg.junit.Assert.assertEquals;
88

99
publicclass_997Test {
10-
privatestatic_997.Solution1solution1;
11-
privatestaticint[][]trust;
12-
13-
@BeforeClass
14-
publicstaticvoidsetup() {
15-
solution1 =new_997.Solution1();
16-
}
17-
18-
@Test
19-
publicvoidtest1() {
20-
trust =newint[][] {{1,2}};
21-
assertEquals(2,solution1.findJudge(2,trust));
22-
}
23-
24-
@Test
25-
publicvoidtest2() {
26-
trust =newint[][] {{1,3}, {2,3}};
27-
assertEquals(3,solution1.findJudge(3,trust));
28-
}
29-
30-
@Test
31-
publicvoidtest3() {
32-
trust =newint[][] {{1,2}, {2,3}, {3,1}};
33-
assertEquals(-1,solution1.findJudge(3,trust));
34-
}
35-
36-
@Test
37-
publicvoidtest4() {
38-
trust =newint[][] {{1,2}, {2,3}};
39-
assertEquals(-1,solution1.findJudge(3,trust));
40-
}
41-
42-
@Test
43-
publicvoidtest5() {
44-
trust =newint[][] {{1,3}, {1,4}, {2,3}, {2,4}, {4,3}};
45-
assertEquals(3,solution1.findJudge(4,trust));
46-
}
47-
48-
@Test
49-
publicvoidtest6() {
50-
trust =newint[][] {{1,3}, {2,3}, {3,1}};
51-
assertEquals(-1,solution1.findJudge(3,trust));
52-
}
10+
privatestatic_997.Solution1solution1;
11+
privatestatic_997.Solution2solution2;
12+
privatestaticint[][]trust;
13+
14+
@BeforeClass
15+
publicstaticvoidsetup() {
16+
solution1 =new_997.Solution1();
17+
solution2 =new_997.Solution2();
18+
}
19+
20+
@Test
21+
publicvoidtest1() {
22+
trust =newint[][]{{1,2}};
23+
assertEquals(2,solution1.findJudge(2,trust));
24+
assertEquals(2,solution2.findJudge(2,trust));
25+
}
26+
27+
@Test
28+
publicvoidtest2() {
29+
trust =newint[][]{{1,3}, {2,3}};
30+
assertEquals(3,solution1.findJudge(3,trust));
31+
}
32+
33+
@Test
34+
publicvoidtest3() {
35+
trust =newint[][]{{1,2}, {2,3}, {3,1}};
36+
assertEquals(-1,solution1.findJudge(3,trust));
37+
}
38+
39+
@Test
40+
publicvoidtest4() {
41+
trust =newint[][]{{1,2}, {2,3}};
42+
assertEquals(-1,solution1.findJudge(3,trust));
43+
}
44+
45+
@Test
46+
publicvoidtest5() {
47+
trust =newint[][]{{1,3}, {1,4}, {2,3}, {2,4}, {4,3}};
48+
assertEquals(3,solution1.findJudge(4,trust));
49+
}
50+
51+
@Test
52+
publicvoidtest6() {
53+
trust =newint[][]{{1,3}, {2,3}, {3,1}};
54+
assertEquals(-1,solution1.findJudge(3,trust));
55+
}
5356
}

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