C++ 알고리즘 - 백준 10809 알파벳 찾기

https://www.acmicpc.net/problem/10809

 

#include <iostream>
using namespace std;

int main(void) {
	// C++ Init
	ios::sync_with_stdio(false);
	cin.tie(NULL);

	string str;
	char ch;
	int chk[26];

	for (int i = 0; i < 26; i++) {
		chk[i] = -1;
	}

	cin >> str;

	int len = str.length();

	for (int i = 0; i < len; i++) {
		int idx = str[i] - '0' - 49; // a=0, b=1, c=2...

		if (chk[idx] == -1) chk[idx] = i;
	}

	for (int i = 0; i < 26; i++) {
		cout << chk[i] << " ";
	}
}