[C++] 백준1316 그룹 단어 체커

#include <iostream>
using namespace std;
int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);

	int n, cnt=0;
	int arr[30] = { 0 };
	char str[101];

	cin >> n;
	for (int i = 0; i < n; i++) {
		cin >> str;
		for (int j = 0; j < 26; j++) arr[j] = -1;		
		for (int j = 0; j < 101; j++) {
			if (str[j] == '\0') {
				cnt++;
				break;
			}
			if (arr[str[j] - 'a'] == -1 || j - arr[str[j] - 'a'] <= 1)
				arr[str[j] - 'a'] = j;
			else 
				break;
		}
	}
	cout << cnt << '\n';

	return 0;
}