[백준] JAVA 1157: 단어 공부

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

1157번: 단어 공부

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Solution:

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

public class Main {
	public static void main(String[] args) throws Exception {
		
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String str = br.readLine();
		int[] arr = new int[26];
		int max = 0;
		char maxAlpha = '?';
		
		for(int i=0;i<str.length();i++) {
			if(str.charAt(i)<91) {
				arr[str.charAt(i)-65]++;
			}
				
			else {
				arr[str.charAt(i)-97]++;
			}
		}
		
		/*for(int v:arr) {
			System.out.print(v);
		}*/
		
		for(int i=0;i<arr.length;i++) {
			if(arr[i]>max) {
				max = arr[i];
				maxAlpha = (char)(i+65);
			}
			else if (arr[i] == max) {
				maxAlpha = '?';
			}
		}

		System.out.print(maxAlpha);
		
		br.close();
	}
}

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