[20260121] BOJ / G3 / 소수의 연속합 / 이준희

Author: JHLEE325

JHLEE325/202601/21 BOJ G3 소수의 연속함.md

@@ -0,0 +1,50 @@
+```java
+import java.io.*;
+import java.util.*;
+
+public class Main {
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        int N = Integer.parseInt(br.readLine());
+
+        if (N == 1) {
+            System.out.println(0);
+            return;
+        }
+
+        boolean[] isPrime = new boolean[N + 1];
+        Arrays.fill(isPrime, true);
+        isPrime[0] = isPrime[1] = false;
+
+        for (int i = 2; i * i <= N; i++) {
+            if (isPrime[i]) {
+                for (int j = i * i; j <= N; j += i) {
+                    isPrime[j] = false;
+                }
+            }
+        }
+
+        List<Integer> primes = new ArrayList<>();
+        for (int i = 2; i <= N; i++) {
+            if (isPrime[i]) primes.add(i);
+        }
+
+        int count = 0;
+        int start = 0, end = 0, sum = 0;
+        int size = primes.size();
+
+        while (true) {
+            if (sum >= N) {
+                if (sum == N) count++;
+                sum -= primes.get(start++);
+            } else if (end == size) {
+                break;
+            } else {
+                sum += primes.get(end++);
+            }
+        }
+
+        System.out.println(count);
+    }
+}
+```