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  1. import java.util.*;
  2. import java.io.*;
  3.  
  4. public class Main{
  5.  
  6.     public static void main(String[] args) throws IOException{
  7.  
  8.         BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
  9.         int n=Integer.parseInt(br.readLine());
  10.         String line=br.readLine();
  11.         String str[]=line.trim().split("\\s+");
  12.         long a[]=new long[n];
  13.         long b[]=new long[n];
  14.         for(int i=0;i<n;i++)
  15.         {
  16.             a[i]=Long.parseLong(str[i]);
  17.  
  18.         }
  19.         String line1=br.readLine();
  20.         String str1[]=line1.trim().split("\\s+");
  21.         HashMap<Double,Integer> mp=new HashMap<>();
  22.         int ans=0;
  23.         for(int j=0;j<n;j++)
  24.         {
  25.             b[j]=Long.parseLong(str1[j]);
  26.  
  27.         }
  28.         int zero=0;
  29.         for(int p=0;p<n;p++)
  30.         {
  31.  
  32.  
  33.            if(a[p]==0&&b[p]==0)
  34.            {
  35.                zero++;
  36.                continue;
  37.            }
  38.            else if(a[p]!=0&&b[p]!=0)
  39.            double g=b[p]*1.0/a[p]*1.0;
  40.  
  41.             if(!mp.containsKey(g))
  42.             {
  43.                 mp.put(g,1);
  44.                  ans=Math.max(ans,1);
  45.             }
  46.             else
  47.             {
  48.                 int k=mp.get(g);
  49.                 mp.put(g,k+1);
  50.                 ans=Math.max(ans,k+1);
  51.             }
  52.         }
  53.         System.out.println(ans+zero);
  54.     }
  55. }
Runtime error #stdin #stdout #stderr 0.09s 32624KB
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Standard input is empty
stdout
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Standard output is empty
stderr
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Exception in thread "main" java.lang.NumberFormatException: null
	at java.base/java.lang.Integer.parseInt(Integer.java:620)
	at java.base/java.lang.Integer.parseInt(Integer.java:776)
	at Main.main(Main.java:9)
https://ideone.com/Gg7lPR
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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