[20251113] PGM / LV3 / 단속카메라 / 강신지

Author: ksinji

ksinji/202511/13 PGM 단속카메라.md

@@ -0,0 +1,24 @@
+```java
+import java.util.*;
+
+class Solution {
+    public int solution(int[][] routes) {
+        Arrays.sort(routes, (a, b) -> Integer.compare(a[1], b[1]));
+        
+        int answer = 0;
+        int camera = Integer.MIN_VALUE;
+        
+        for (int[] r : routes){
+            int s = r[0];
+            int e = r[1];
+            
+            if (camera < s){
+                camera = e;
+                answer++;
+            }
+        }
+        
+        return answer;
+    }
+}
+```