백준 1806

package baekjoon.투포인터;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

class Main1806 {

   static int S, N;
   static int[] A;

   private static void go() {
      int R = 0, sum = 0, ans = N + 1;
      for (int L = 1; L <= N; L++) {
         sum -= A[L - 1];
         
         while (R + 1 <= N && sum < S) {
            R++;
            sum += A[R];
         }
         
         if (sum >= S) {
            ans = Math.min(ans, R - L + 1);
         }
      }
      if (ans == N + 1) {
         ans = 0;
      }
      System.out.println(ans);
   }

   public static void main(String[] args) throws Exception {
      input();
      go();
   }

   private static void input() throws IOException {
      BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      StringTokenizer st = new StringTokenizer(br.readLine());
      N = Integer.parseInt(st.nextToken());
      S = Integer.parseInt(st.nextToken());
      st = new StringTokenizer(br.readLine());
      A = new int[N + 1];
      for (int i = 1; i <= N; i++) {
         A[i] = Integer.parseInt(st.nextToken());
      }
   }
}