[etc] 백준 10809 알파벳 찾기

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

쉬웠습니다.

#include <iostream>
#include <string>
using namespace std;
 
int main(){
    string s;
    int arr[26] = {0};
    
    cin >> s;
    
    for(int i = 0; i < s.size(); i++){
        if(!arr[s[i]-97]) arr[s[i]-97] = i+1;
    }
    
    for(int i = 0; i < 26; i++){
        if(arr[i] == 0) cout << -1 << ' ';
        else            cout << arr[i]-1 << ' ';
    }
}