[20250219] BOJ / 골드4 / 사냥꾼 / 이강현

Author: lkhyun

lkhyun/202502/19 BOJ 골드4 사냥꾼.md

@@ -0,0 +1,67 @@
+```java
+import java.util.*;
+import java.io.*;
+
+public class Main {
+    public static void main(String[] args) throws Exception{
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+        StringTokenizer st = new StringTokenizer(br.readLine());
+        int M = Integer.parseInt(st.nextToken());
+        int N = Integer.parseInt(st.nextToken());
+        int L = Integer.parseInt(st.nextToken());
+        int[] Ms = new int[M];
+        st = new StringTokenizer(br.readLine());
+        for (int i = 0; i < M; i++) {
+            Ms[i] = Integer.parseInt(st.nextToken());
+        }
+        List<int[]> Ns = new ArrayList<>(N); 
+        for (int i = 0; i < N; i++) {
+            st = new StringTokenizer(br.readLine());
+            int x = Integer.parseInt(st.nextToken());
+            int y = Integer.parseInt(st.nextToken());
+            Ns.add(new int[]{x,y});
+        }
+
+        Arrays.sort(Ms);
+
+        int count=0;
+        for (int[] i:Ns) {
+            int state = Arrays.binarySearch(Ms, i[0]);
+            if(state>=0){
+                if(i[1]<=L){
+                    count++;
+                }
+
+            }else{
+                int temp = -(state+1);
+                int lefttemp = temp-1;
+                int righttemp = temp;
+                if(lefttemp<0){
+                    if((long)Ms[righttemp] - i[0] + i[1] <= (long)L){
+                        count++;
+                    }
+                }else if(righttemp==Ms.length){
+                    if((long)i[0]-Ms[lefttemp] + i[1] <= (long)L){
+                        count++;
+                    }
+
+                }else{
+                    if((long)Ms[righttemp]-i[0]>(long)i[0]-Ms[lefttemp]){
+                        if((long)i[0]-Ms[lefttemp] + i[1] <= (long)L){
+                            count++;
+                        }
+                    }else{
+                        if((long)Ms[righttemp] - i[0] + i[1] <= (long)L){
+                            count++;
+                        }
+                    }
+                }
+            }
+        }
+        bw.write(String.valueOf(count));
+        bw.flush();
+    }    
+}
+
+```