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  1. import java.util.Scanner;
  2.  
  3. public class Main{
  4.     public static void main(String[] args){
  5.         Scanner in = new Scanner(System.in);
  6.  
  7.         String s = in.next();
  8.         s = s.toUpperCase(); 
  9.  
  10.         int[] count = new int[26];
  11.  
  12.         for(int i = 0; i < s.length(); i++){
  13.             int a = s.charAt(i);
  14.             count[a-65]++;
  15.         }
  16.  
  17.         int max = count[0];
  18.         int idx = 0;
  19.  
  20.         for(int i = 1; i < 26; i++){
  21.             if(count[i] > max){
  22.                 max = count[i];
  23.                 idx = i;
  24.             } 
  25.         }
  26.  
  27.         int resultCount = 0;
  28.  
  29.         for(int i = 1; i < 26; i++){
  30.             if(max == count[i])resultCount++;   
  31.         }
  32.  
  33.         if(resultCount > 1){
  34.             System.out.println("?");
  35.         }else{
  36.             System.out.println((char)(idx + 65));
  37.         }   
  38.     }
  39. }
Success #stdin #stdout 0.14s 54504KB
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A
https://ideone.com/EPgMzO
language:
Java (HotSpot 12)
created:
30 days ago
visibility:
public

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