[알고리즘][문자열처리] 1157 단어공부

[알고리즘][문자열처리] 1157 단어공부

https://www.acmicpc.net/problem/1157

package algorithm_basic;
 
import java.util.Scanner;
 
public class q_1157 {
 
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        char[] line = scan.nextLine().toCharArray();
        int[] alphabat = new int['Z'-'A'+2];
        for(int i=0;i<alphabat.length;i++) {
            alphabat[i] = 0;
        }
        for(int i=0;i<line.length;i++) {
            int tmp = (int)line[i];
            if(tmp>64 && tmp<91) {
                int num = (int)line[i]-'A';
                alphabat[num]++;
            }else if(tmp>96 && tmp<123) {
                int num = tmp-'a';
                alphabat[num]++;
            }
        }
 
        int max = 0;
        int max_num = 0;
        int chk = 0;
        for(int i=0;i<alphabat.length;i++) {
            if(alphabat[i]!=0 && max<alphabat[i]) {
                max_num = i;
                max = alphabat[i];
            }else if(alphabat[i]!=0 && max == alphabat[i]){
                chk = alphabat[i];
            }
            
        }
        
        if(max==chk) {
            System.out.println("?");        
        }else {
            max_num = (int)max_num+'A';
            char max_alphabat = (char)max_num;
            System.out.println(max_alphabat);    
        }
    }
 
}