[20260202] BOJ / G5 / 입국심사 / 김민진

Author: zinnnn37

zinnnn37/202602/02 BOJ G5 입국심사.md

@@ -0,0 +1,61 @@
+```java
+import java.io.*;
+import java.util.StringTokenizer;
+
+public class BJ_3079_입국심사 {
+
+    private static final BufferedReader  br = new BufferedReader(new InputStreamReader(System.in));
+    private static final BufferedWriter  bw = new BufferedWriter(new OutputStreamWriter(System.out));
+    private static       StringTokenizer st;
+
+    private static int N, M;
+    private static int   min;
+    private static int[] immigration;
+
+    public static void main(String[] args) throws IOException {
+        init();
+        sol();
+    }
+
+    private static void init() throws IOException {
+        st = new StringTokenizer(br.readLine());
+        N = Integer.parseInt(st.nextToken());
+        M = Integer.parseInt(st.nextToken());
+
+        min = Integer.MAX_VALUE;
+        immigration = new int[N];
+        for (int i = 0; i < N; i++) {
+            immigration[i] = Integer.parseInt(br.readLine());
+            min = Math.min(min, immigration[i]);
+        }
+    }
+
+    private static void sol() throws IOException {
+        long left  = 1;
+        long right = (long) min * M;
+        while (left < right) {
+            long mid = left + (right - left) / 2;
+
+            if (canUseImmigration(mid)) {
+                right = mid;
+            } else {
+                left = mid + 1;
+            }
+        }
+        bw.write(left + "");
+        bw.flush();
+        bw.close();
+        br.close();
+    }
+
+    private static boolean canUseImmigration(long time) {
+        long cnt = 0;
+        for (int t : immigration) {
+            cnt += time / t;
+            if (cnt >= M) return true;
+        }
+        return cnt >= M;
+    }
+
+}
+```