hackerrank boilerplate

boilerplate.cpp

#include <bits/stdc++.h>

using namespace std;

vector<string> split_string(string);

// Complete the sockMerchant function below.
int sockMerchant(int n, vector<int> ar) {


}

int main()
{
    ofstream fout(getenv("OUTPUT_PATH"));

    int n;
    cin >> n;
    cin.ignore(numeric_limits<streamsize>::max(), '\n');

    string ar_temp_temp;
    getline(cin, ar_temp_temp);

    vector<string> ar_temp = split_string(ar_temp_temp);

    vector<int> ar(n);

    for (int i = 0; i < n; i++) {
        int ar_item = stoi(ar_temp[i]);

        ar[i] = ar_item;
    }

    int result = sockMerchant(n, ar);

    fout << result << "\n";

    fout.close();

    return 0;
}

vector<string> split_string(string input_string) {
    string::iterator new_end = unique(input_string.begin(), input_string.end(), [] (const char &x, const char &y) {
        return x == y and x == ' ';
    });

    input_string.erase(new_end, input_string.end());

    while (input_string[input_string.length() - 1] == ' ') {
        input_string.pop_back();
    }

    vector<string> splits;
    char delimiter = ' ';

    size_t i = 0;
    size_t pos = input_string.find(delimiter);

    while (pos != string::npos) {
        splits.push_back(input_string.substr(i, pos - i));

        i = pos + 1;
        pos = input_string.find(delimiter, i);
    }

    splits.push_back(input_string.substr(i, min(pos, input_string.length()) - i + 1));

    return splits;
}

boilerplate.go

package main

import (
    "bufio"
    "fmt"
    "io"
    "os"
    "strconv"
    "strings"
)

// Complete the sockMerchant function below.
func sockMerchant(n int32, ar []int32) int32 {


}

func main() {
    reader := bufio.NewReaderSize(os.Stdin, 1024 * 1024)

    stdout, err := os.Create(os.Getenv("OUTPUT_PATH"))
    checkError(err)

    defer stdout.Close()

    writer := bufio.NewWriterSize(stdout, 1024 * 1024)

    nTemp, err := strconv.ParseInt(readLine(reader), 10, 64)
    checkError(err)
    n := int32(nTemp)

    arTemp := strings.Split(readLine(reader), " ")

    var ar []int32

    for i := 0; i < int(n); i++ {
        arItemTemp, err := strconv.ParseInt(arTemp[i], 10, 64)
        checkError(err)
        arItem := int32(arItemTemp)
        ar = append(ar, arItem)
    }

    result := sockMerchant(n, ar)

    fmt.Fprintf(writer, "%d\n", result)

    writer.Flush()
}

func readLine(reader *bufio.Reader) string {
    str, _, err := reader.ReadLine()
    if err == io.EOF {
        return ""
    }

    return strings.TrimRight(string(str), "\r\n")
}

func checkError(err error) {
    if err != nil {
        panic(err)
    }
}

boilerplate.rb

#!/bin/ruby

require 'json'
require 'stringio'

# Complete the sockMerchant function below.
def sockMerchant(n, ar)


end

fptr = File.open(ENV['OUTPUT_PATH'], 'w')

n = gets.to_i

ar = gets.rstrip.split(' ').map(&:to_i)

result = sockMerchant n, ar

fptr.write result
fptr.write "\n"

fptr.close()