[백준] 10809번 알파벳 찾기 c++

#include <iostream>

using namespace std;

int main(void) {
	ios::sync_with_stdio(NULL);
	cin.tie(NULL);
	cout.tie(NULL);

	int arr[26] = {0,};
	for (int i = 0; i < 26;i++) {
		arr[i] = -1;
	}
	
	string str;
	cin >> str;
	for (int j = 0; j < str.length(); j++) {
		if(arr[str[j] - 'a'] == -1)
			arr[str[j] - 'a'] = j;
	}


	for (int n : arr) {
		cout << n << " ";
	}
	return 0;
}