171201_1316_그룹 단어 체커

//https://www.acmicpc.net/problem/1316 #include <iostream>

#include <string>

using namespace std;

int main()

{

int N;

cin >> N;

int cnt=0;

for(int i=0; i<N; i++)

{

string word;

cin >> word;

bool alphbet[26]={0};

bool chk=0;

int l=word.size();

for(int j=0; j<l; j++)

{

if(j>0 && word[j]!=word[j-1] && alphbet[word[j]-'a']) chk=1;

alphbet[word[j]-'a']=1;

}

if(!chk) cnt++;

}

cout << cnt;

}