링크 → https://www.acmicpc.net/problem/1072

• 아영

  • 코드

  import java.io.BufferedReader;
  import java.io.InputStreamReader;
  import java.util.StringTokenizer;
  
  public class boj1072 {
      public static void main(String[] args) throws Exception{
          BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
          StringTokenizer st = new StringTokenizer(br.readLine());
  
          long X = Integer.parseInt(st.nextToken());
          long Y = Integer.parseInt(st.nextToken());
          double Z = Math.floor(Y*100/X);
          int answer = 0;
          if(Z>=99) answer = -1;
          else{
              Z+=1;
              answer= (int)Math.ceil((100*Y-Z*X)/(Z-100));
          }
          System.out.println(answer);
      }
  }
  

  • 시간,메모리

  

• 은영

  • 코드

  import java.io.BufferedReader;
  import java.io.IOException;
  import java.io.InputStreamReader;
  import java.util.StringTokenizer;
  
  public class baekjoon1072 {
  	public static void main(String[] args) throws IOException {
  		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
  		StringTokenizer st = new StringTokenizer(br.readLine()+" ");
  		
  		long X = Integer.parseInt(st.nextToken());
  		long Y = Integer.parseInt(st.nextToken());
  		
  		long Z = 100*Y/X;
  		
  		if(Z>=99) {			
  			System.out.println(-1);
  		}else {
  			long start = 1;
  			long end = X;
  			
  			long mid=0;
  			long percent=0;
  			while(start<=end) {
  				mid = (start+end)/2;
  				percent = (Y+mid)*100/(X+mid);
  				
  				if(percent>Z) {
  					end=mid-1;
  				}
  				else {
  					start=mid+1;
  				}
  			}
  			System.out.println(start);
  		}
  		
  	}
  }
  

  • 시간,메모리

  

• 건

  • 코드
  • 시간,메모리

• 용문

  • 코드

  class BJ1072 {
      
      private var X: Int = 0
      private var Y: Int = 0
      private var Z: Int = 0
      private var answer: Int = -1
      
      public func solve() {
          readComponents()
          calc()
          printAnswer()
      }
      
      private func readComponents() {
          let temp = readLine()!.split(separator: " ").map{ Int($0)! }
          self.X = temp[0]
          self.Y = temp[1]
          
          self.Z = Y * 100 / X
      }
      
      private func calc() {
          if Z >= 99 { return }
          
          var low = 0
          var high = 1000000000
          
          while low <= high {
              let mid = (low + high) / 2
              
              let temp = (Y + mid) * 100 / (X + mid)
              
              if Z != temp {
                  high = mid - 1
                  answer = mid
              } else {
                  low = mid + 1
              }
          }
      }
      
      private func printAnswer() {
          print(answer)
      }
  }
  
  BJ1072().solve()
  

  • 시간,메모리