1 files changed, 46 insertions, 0 deletions
diff --git a/challenge-206/lubos-kolouch/java/ch-1.java b/challenge-206/lubos-kolouch/java/ch-1.java
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index 0000000000..18d9a6fa3b
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+++ b/challenge-206/lubos-kolouch/java/ch-1.java
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+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+public class ShortestTimeTest {
+
+  public static int shortestTimeInMinutes(String[] times) {
+    int minDiff = 24 * 60; // maximum possible difference in minutes
+    for (int i = 0; i < times.length - 1; i++) {
+      for (int j = i + 1; j < times.length; j++) {
+        String[] parts1 = times[i].split(":");
+        String[] parts2 = times[j].split(":");
+        int h1 = Integer.parseInt(parts1[0]);
+        int m1 = Integer.parseInt(parts1[1]);
+        int h2 = Integer.parseInt(parts2[0]);
+        int m2 = Integer.parseInt(parts2[1]);
+        int diff = Math.abs((h1 - h2) * 60 + (m1 - m2));
+        if (diff > 12 * 60) { // account for circular time
+          diff = 24 * 60 - diff;
+        }
+        if (diff < minDiff) {
+          minDiff = diff;
+        }
+      }
+    }
+    return minDiff;
+  }
+
+  @Test
+  public void testExample1() {
+    String[] times = {"00:00", "23:55", "20:00"};
+    assertEquals(5, shortestTimeInMinutes(times));
+  }
+
+  @Test
+  public void testExample2() {
+    String[] times = {"01:01", "00:50", "00:57"};
+    assertEquals(4, shortestTimeInMinutes(times));
+  }
+
+  @Test
+  public void testExample3() {
+    String[] times = {"10:10", "09:30", "09:00", "09:55"};
+    assertEquals(15, shortestTimeInMinutes(times));
+  }
+}