[20251202] PGM / LV2 / 아날로그 시계 / 한종욱

Ukj0ng/202512/2 PGM LV2 아날로그 시계.md

@@ -0,0 +1,40 @@
+```
+class Solution {
+    static final int FULL_CIRCLE = 43200;
+
+    public int solution(int h1, int m1, int s1, int h2, int m2, int s2) {
+        int start = h1 * 3600 + m1 * 60 + s1;
+        int end = h2 * 3600 + m2 * 60 + s2;
+
+        int answer = countAlarms(end) - countAlarms(start);
+
+        if (isExactOverlap(start)) {
+            answer++;
+        }
+
+        return answer;
+    }
+
+    private int countAlarms(int time) {
+        int mCount = time * 59 / 3600;
+        int hCount = time * 719 / 43200;
+
+        int overlap = time / 43200;
+
+        return mCount + hCount - overlap;
+    }
+
+    private boolean isExactOverlap(int time) {
+        if (time % 43200 == 0) {
+            return true;
+        }
+
+        double secondAngle = (time % 60) * 6.0;
+        double minuteAngle = (time % 3600) * 0.1;
+        double hourAngle = (time % 43200) * (1.0 / 120.0);
+
+        return Math.abs(secondAngle - minuteAngle) < 0.01 || 
+               Math.abs(secondAngle - hourAngle) < 0.01;
+    }
+}
+```