[20250902] BOJ / G4 / 부분합 / 김민진

Author: zinnnn37

zinnnn37/202509/2 BOJ G4 부분합.md

@@ -0,0 +1,58 @@
+```java
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.OutputStreamWriter;
+import java.util.StringTokenizer;
+
+public class BJ_1806_부분합 {
+
+    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;
+    private static int S;
+    private static int ans;
+    private static int[] nums;
+
+    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());
+        S = Integer.parseInt(st.nextToken());
+        ans = Integer.MAX_VALUE;
+
+        nums = new int[N];
+        st = new StringTokenizer(br.readLine());
+        for (int i = 0; i < N; i++) {
+            nums[i] = Integer.parseInt(st.nextToken());
+        }
+    }
+
+    private static void sol() throws IOException {
+        int left = 0, right = 0;
+        int tmp = 0;
+        while (right < N) {
+            tmp += nums[right];
+
+            while (tmp >= S) {
+                ans = Math.min(ans, right - left + 1);
+                tmp -= nums[left];
+                left++;
+            }
+            right++;
+        }
+        bw.write(ans != Integer.MAX_VALUE ? ans + "" : "0");
+        bw.flush();
+        bw.close();
+        br.close();
+    }
+
+}
+```