include<stdio.h>
#include<string.h>
#include<stdlib.h>

#define search(key, a, n) bsearch(key, a, n, sizeof(int), compare);
#define sort(a, n) qsort(a, n, sizeof(int), compare);
#define FOR(i, a, n) for(i = a; i < n; i++)
#define loop(i, n) FOR(i, 0, n)
#define read(n) scanf(" %d", &n)
typedef long long ll;

void swap(int *a, int *b)
{
        int *temp;
        *temp = *a;
        *a = *b;
        *b = *temp;
}

int min(int a, int b)
{
        if(a > b)
                return b;
        return a;
}

int max(int a, int b)
{
        if(a > b)
                return a;
        return b;
}

int gcd(int a, int b)
{
        return(b == 0 ? a : gcd(b, a%b));
}

int compare (const void * a, const void * b)
{
        return ( *(int*)a - *(int*)b );
}

int main()
{
        char a[100], b[5] = { 'h', 'e', 'l', 'l', 'o' };
        int flag = 0, len, i, j = 0, k;
        scanf(" %s", a);
        len = strlen(a);
        loop(i, len)
        {
                if(a[i] == b[j])
                {
                        if(j == 4)
                        {
                                printf("YES");
                                return 0;
                        }
                        //printf(" %d %d %c\n", i, j, b[j]);
                        j ++;
                }
        }
        printf("NO");
        return 0;
}

Line 1: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token