58A. Chat room

greedy, strings, 1000, http://codeforces.com/problemset/problem/58/A

思路：逐个检查即可，用时约10min

#include <iostream>

using namespace std;

const string standard = "hello";

bool check(string input)
{
	int p = 0;
	for (auto i : input)
	{
		if (i == standard[p])  p++;
		if (p == standard.length()) return true;
	}
    return false;
}

int main()
{
	string input;
	cin >> input;
	if (check(input)) 
		cout << "YES";
	else
        cout << "NO";
    return 0;
}