[백준] 13458 - 시험감독

13458번: 시험 감독

• 코드

  package review;
  
  import java.io.BufferedReader;
  import java.io.FileInputStream;
  import java.io.IOException;
  import java.io.InputStreamReader;
  import java.util.StringTokenizer;
  
  public class ex_13458 {
      public static void main(String[] args) throws IOException {
          System.setIn(new FileInputStream("code/src/input/13458.txt"));
          BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
          int N = Integer.parseInt(br.readLine());
          StringTokenizer st = new StringTokenizer(br.readLine());
          int[]A=new int[N];
          for(int i=0;i<N;i++){
              A[i] = Integer.parseInt(st.nextToken());
          }
          st = new StringTokenizer(br.readLine());
          int B = Integer.parseInt(st.nextToken());
          int C = Integer.parseInt(st.nextToken());
          long answer=N;
          for(int i=0;i<N;i++){
              if(A[i]-B>0) answer+=(Math.ceil((float)(A[i]-B)/C));
          }
          System.out.println(answer);
      }
  }

• 아이디어
  • 답이 long인지 아닌지 항상 확인하기