Print Hackerearth

I am implementing the solution after seeing the code:

#include<iostream>
#include<bits/stdc++.h>
using namespace std;
int main()
{

    int n;
    int p;
    cin>>n;
    string s;
    cin>>s;
    int a[7]= {0};
    if(n<11)
    {
        cout<<"0";
    }
    else
    {
        for(int i=0; i<n; i++)
        {
            if(s[i]=='h')
            {
                a[0]++;
            }
            else if(s[i]=='a')
            {
                a[1]++;
            }
            else if(s[i]=='c')
            {
                a[2]++;
            }
            else if(s[i]=='k')
            {
                a[3]++;
            }
            else if(s[i]=='e')
            {
                a[4]++;
            }
            else if(s[i]=='r')
            {
                a[5]++;
            }
            else if(s[i]=='t')
            {
                a[6]++;
            }
        }
        a[0]=a[0]/2;
        a[1]=a[1]/2;
        a[4]=a[4]/2;
        a[5]=a[5]/2;

        p=a[0];
        for(int i=0; i<7; i++)
        {
            if(p>a[i])
            {
                p=a[i];
            }
        }

        cout<<p<<endl;
    }
    return 0;
}