HackerRank Tweets Solution

#include<iostream>
#include<cstring>
#include<cstdio>
#include<string>
#include<map>
#include<vector>
#include<algorithm>
#include<ctype.h>
using namespace std;
int main()
{
    long long num,count,C,L,a[100000],i,j,k,l,m,n,kase;
    string s,s1;
    vector<long>v1;
    vector<long>v2;
    map<char,int>m1;
    map<char,int>m2;
    cin>>kase;
    count=0;
    string str="hackerrank";
    getchar();
    while(kase--)
    {
        s1="";
        getline(cin,s);
        int len=s.size();
        for(i=0; i<len; i++)
        {
            if(s[i]=='h'||s[i]=='H')
            {
                s1="";
                int len1=i+10;
                if(len1>len)
                {
                    break;
                }
                for(j=i; j<len1; j++)
                {
                    char ch=tolower(tolower(s[j]));
                    s1+=ch;
                }
                if(s1==str)
                {
                    count++;
                }
            }
        }
    }
     cout<<count<<endl;
        return 0;
    }

import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;
public class Solution {
    public static void main(String[] args) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
		Scanner in = new Scanner(System.in);
        int count = 0;
		int testcase = in.nextInt();
		String b = in.nextLine();
        String format = "(?i).*(#|@|)hackerrank.*";
		String[] fill = new String[testcase];
		for (int i = 0;i<fill.length; i++){
			fill[i] = in.nextLine();
			if(fill[i].matches(format) == true){
				count++;
			}
		}
        System.out.println(count);
    }
}

import re
from sets import Set
import string
import sys
n = int(input())
res = 0
for i in range(n):
    s = raw_input()
    if(re.match(".*hackerrank.*",string.lower(s))):
        res+=1
print(res)

'use strict';
function processData(input) {
    var parse_fun = function (s) { return parseInt(s, 10); };
    var hackerRE = new RegExp('[#@]?hackerrank', 'ig');
    var lines = input.split('\n');
    var N = parse_fun(lines.shift());
    var data = lines.splice(0, N);
    var res = 0;
    data.forEach(function (s) {
        var arr = s.match(hackerRE);
        if (arr != null) { res += arr.length; }
    });
   console.log(res);
}
process.stdin.resume();
process.stdin.setEncoding("ascii");
var _input = "";
process.stdin.on("data", function (input) { _input += input; });
process.stdin.on("end", function () { processData(_input); });

<?php
$a = fopen('php://stdin','r');
fscanf($a,'%d',$v);
$count=0;
while($v--)
{
	 $b = fgets($a);
	 $b = trim($b);
	 if(preg_match('/\[email protected]\b/i',$b) || (preg_match('/\b#hackerrank\b/i', $b)) || (preg_match("/hackerrank/i",$b))){
			$count++;
	}
	 
}
echo $count;