A. Chat room Solution

#include<stdio.h>
int main()
{
    char aa[101];
    int i=0,j,f1=0,f2=0,f3=0,f4=0,f5=0;
    scanf("%s",aa);
    for (;aa[i];i++){
        if (aa[i]=='h'){
            f1=1;
            i++;
            break;
        }
    }
    for (;aa[i];i++){
        if (aa[i]=='e'){
            f2=1;
            i++;
            break;
        }
    }
    for (;aa[i];i++){
        if (aa[i]=='l'){
            f3=1;
            i++;
            break;
        }
    }
    for (;aa[i];i++){
        if (aa[i]=='l'){
            f4=1;
            i++;
            break;
        }
    }
    for (;aa[i];i++){
        if (aa[i]=='o'){
            f5=1;
            i++;
            break;
        }
    }

    if (f1==1&&f2==1&&f3==1&&f4==1&&f5==1)
        printf("YES\n");
    else
        printf("NO\n");

    return 0;

}


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