// Source : https://leetcode.com/problems/check-if-the-sentence-is-pangram/
// Author : Hao Chen
// Date   : 2021-04-20

/***************************************************************************************************** 
 *
 * A pangram is a sentence where every letter of the English alphabet appears at least once.
 * 
 * Given a string sentence containing only lowercase English letters, return true if sentence is a 
 * pangram, or false otherwise.
 * 
 * Example 1:
 * 
 * Input: sentence = "thequickbrownfoxjumpsoverthelazydog"
 * Output: true
 * Explanation: sentence contains at least one of every letter of the English alphabet.
 * 
 * Example 2:
 * 
 * Input: sentence = "leetcode"
 * Output: false
 * 
 * Constraints:
 * 
 * 	1 <= sentence.length <= 1000
 * 	sentence consists of lowercase English letters.
 ******************************************************************************************************/

class Solution {
public:
    bool checkIfPangram(string sentence) {
        bool stat[26] = {false};
        for(auto& c: sentence) {
            stat[c - 'a'] = true;
        }
        for(auto& s : stat) {
            if (!s) return false;
        }
        return true;
    }
};