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부분수열의 합
비트마스킹 연습
### 풀이 언어 - python/java ### 코드 ```python/java ``` ### 핵심 로직 혹은 자료구조 - ### 시간 복잡도 - O( )
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import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.util.StringTokenizer; public class Main { public static void main(String[] args) throws IOException { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); StringTokenizer st = new StringTokenizer(br.readLine()); int n = Integer.parseInt(st.nextToken()); int s = Integer.parseInt(st.nextToken()); st = new StringTokenizer(br.readLine()); int[] arr = new int[n]; for (int i = 0; i < n; i++) { arr[i] = Integer.parseInt(st.nextToken()); } int count = 0; for (int i = 1; i < (1 << n); i++) { int sum = 0; for (int j = 0; j < n; j++) { int temp = i & (1 << j); if(temp > 0) { sum += arr[j]; } } if(sum == s) { count++; } } System.out.println(count); } }
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The text was updated successfully, but these errors were encountered: