[SW Expert Academy] 알파벳 공부 (D3)

https://swexpertacademy.com/main/code/problem/problemDetail.do?problemLevel=3&contestProbId=AYLnMQT6vPADFATf&categoryId=AYLnMQT6vPADFATf&categoryType=CODE&problemTitle=&orderBy=PASS_RATE&selectCodeLang=ALL&select-1=3&pageSize=10&pageIndex=8

SW Expert Academy

 

import java.util.Scanner;

class Solution {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		int t = sc.nextInt();
		
		for(int tc=1;tc<=t;tc++) {
			String str = sc.next();
			
			int count=0;
			
			for(int j=0;j<str.length();j++) {
				if(str.charAt(j)==(char)('a'+j)) {
					count++;
				}
				else {
					break;
				}
			}
			System.out.println("#"+tc+" "+count);
		}
		
	}
}

 

(char)('a' + j) 와 비교해주는 것이 핵심이다.