kazuyamaa/multi-language-messages-01 huggingface dataset:
Task: Chowla numbers
C++: #include <vector>
#include <iostream>

using namespace std;

int chowla(int n)
{
	int sum = 0;
	for (int i = 2, j; i * i <= n; i++)
		if (n % i == 0) sum += i + (i == (j = n / i) ? 0 : j);
	return sum;
}

vector<bool> sieve(int limit)
{
	
	
	vector<bool> c(limit);
	for (int i = 3; i * 3 < limit; i += 2)
		if (!c[i] && (chowla(i) == 0))
			for (int j = 3 * i; j < limit; j += 2 * i)
				c[j] = true;
	return c;
}

int main()
{
	cout.imbue(locale(""));
	for (int i = 1; i <= 37; i++)
		cout << "chowla(" << i << ") = " << chowla(i) << "\n";
	int count = 1, limit = (int)(1e7), power = 100;
	vector<bool> c = sieve(limit);
	for (int i = 3; i < limit; i += 2)
	{
		if (!c[i]) count++;
		if (i == power - 1)
		{
			cout << "Count of primes up to " << power << " = "<< count <<"\n";
			power *= 10;
		}
	}

	count = 0; limit = 35000000;
	int k = 2, kk = 3, p;
	for (int i = 2; ; i++)
	{
		if ((p = k * kk) > limit) break;
		if (chowla(p) == p - 1)
		{
			cout << p << " is a number that is perfect\n";
			count++;
		}
		k = kk + 1; kk += k;
	}
	cout << "There are " << count << " perfect numbers <= 35,000,000\n";
	return 0;
}

Go: package main

import "fmt"

func chowla(n int) int {
    if n < 1 {
        panic("argument must be a positive integer")
    }
    sum := 0
    for i := 2; i*i <= n; i++ {
        if n%i == 0 {
            j := n / i
            if i == j {
                sum += i
            } else {
                sum += i + j
            }
        }
    }
    return sum
}

func sieve(limit int) []bool {
    
    
    c := make([]bool, limit)
    for i := 3; i*3 < limit; i += 2 {
        if !c[i] && chowla(i) == 0 {
            for j := 3 * i; j < limit; j += 2 * i {
                c[j] = true
            }
        }
    }
    return c
}

func commatize(n int) string {
    s := fmt.Sprintf("%d", n)
    le := len(s)
    for i := le - 3; i >= 1; i -= 3 {
        s = s[0:i] + "," + s[i:]
    }
    return s
}

func main() {
    for i := 1; i <= 37; i++ {
        fmt.Printf("chowla(%2d) = %d\n", i, chowla(i))
    }
    fmt.Println()

    count := 1
    limit := int(1e7)
    c := sieve(limit)
    power := 100
    for i := 3; i < limit; i += 2 {
        if !c[i] {
            count++
        }
        if i == power-1 {
            fmt.Printf("Count of primes up to %-10s = %s\n", commatize(power), commatize(count))
            power *= 10
        }
    }

    fmt.Println()
    count = 0
    limit = 35000000
    for i := uint(2); ; i++ {
        p := 1 << (i - 1) * (1<<i - 1) 
        if p > limit {
            break
        }
        if chowla(p) == p-1 {
            fmt.Printf("%s is a perfect number\n", commatize(p))
            count++
        }
    }
    fmt.Println("There are", count, "perfect numbers <= 35,000,000")
}
Task: Chowla numbers
C#: using System;

namespace chowla_cs
{
    class Program
    {
        static int chowla(int n)
        {
            int sum = 0;
            for (int i = 2, j; i * i <= n; i++)
                if (n % i == 0) sum += i + (i == (j = n / i) ? 0 : j);
            return sum;
        }

        static bool[] sieve(int limit)
        {
            
            
            bool[] c = new bool[limit];
            for (int i = 3; i * 3 < limit; i += 2)
                if (!c[i] && (chowla(i) == 0))
                    for (int j = 3 * i; j < limit; j += 2 * i)
                        c[j] = true;
            return c;
        }

        static void Main(string[] args)
        {
            for (int i = 1; i <= 37; i++)
                Console.WriteLine("chowla({0}) = {1}", i, chowla(i));
            int count = 1, limit = (int)(1e7), power = 100;
            bool[] c = sieve(limit);
            for (int i = 3; i < limit; i += 2)
            {
                if (!c[i]) count++;
                if (i == power - 1)
                {
                    Console.WriteLine("Count of primes up to {0,10:n0} = {1:n0}", power, count);
                    power *= 10;
                }
            }

            count = 0; limit = 35000000;
            int k = 2, kk = 3, p;
            for (int i = 2; ; i++)
            {
                if ((p = k * kk) > limit) break;
                if (chowla(p) == p - 1)
                {
                    Console.WriteLine("{0,10:n0} is a number that is perfect", p);
                    count++;
                }
                k = kk + 1; kk += k;
            }
            Console.WriteLine("There are {0} perfect numbers <= 35,000,000", count);
            if (System.Diagnostics.Debugger.IsAttached) Console.ReadKey();
        }
    }
}

C++: #include <vector>
#include <iostream>

using namespace std;

int chowla(int n)
{
	int sum = 0;
	for (int i = 2, j; i * i <= n; i++)
		if (n % i == 0) sum += i + (i == (j = n / i) ? 0 : j);
	return sum;
}

vector<bool> sieve(int limit)
{
	
	
	vector<bool> c(limit);
	for (int i = 3; i * 3 < limit; i += 2)
		if (!c[i] && (chowla(i) == 0))
			for (int j = 3 * i; j < limit; j += 2 * i)
				c[j] = true;
	return c;
}

int main()
{
	cout.imbue(locale(""));
	for (int i = 1; i <= 37; i++)
		cout << "chowla(" << i << ") = " << chowla(i) << "\n";
	int count = 1, limit = (int)(1e7), power = 100;
	vector<bool> c = sieve(limit);
	for (int i = 3; i < limit; i += 2)
	{
		if (!c[i]) count++;
		if (i == power - 1)
		{
			cout << "Count of primes up to " << power << " = "<< count <<"\n";
			power *= 10;
		}
	}

	count = 0; limit = 35000000;
	int k = 2, kk = 3, p;
	for (int i = 2; ; i++)
	{
		if ((p = k * kk) > limit) break;
		if (chowla(p) == p - 1)
		{
			cout << p << " is a number that is perfect\n";
			count++;
		}
		k = kk + 1; kk += k;
	}
	cout << "There are " << count << " perfect numbers <= 35,000,000\n";
	return 0;
}
Task: Shift list elements to left by 3
C: #include <stdio.h>


void lshift(int *l, size_t n) {
    int i, f;
    if (n < 2) return;
    f = l[0];
    for (i = 0; i < n-1; ++i) l[i] = l[i+1];
    l[n-1] = f;
}

int main() {
    int l[] = {1, 2, 3, 4, 5, 6, 7, 8, 9};
    int i;
    size_t n = 9;
    printf("Original list     : ");
    for (i = 0; i < n; ++i) printf("%d ", l[i]);
    printf("\nShifted left by 3 : ");
    for (i = 0; i < 3; ++i) lshift(l, n);
    for (i = 0; i < n; ++i) printf("%d ", l[i]);
    printf("\n");
    return 0;
}

Go: package main

import "fmt"


func lshift(l []int) {
    n := len(l)
    if n < 2 {
        return
    }
    f := l[0]
    for i := 0; i < n-1; i++ {
        l[i] = l[i+1]
    }
    l[n-1] = f
}

func main() {
    l := []int{1, 2, 3, 4, 5, 6, 7, 8, 9}
    fmt.Println("Original list     :", l)
    for i := 0; i < 3; i++ {
        lshift(l)
    }
    fmt.Println("Shifted left by 3 :", l)
}
Task: Shift list elements to left by 3
C: #include <stdio.h>


void lshift(int *l, size_t n) {
    int i, f;
    if (n < 2) return;
    f = l[0];
    for (i = 0; i < n-1; ++i) l[i] = l[i+1];
    l[n-1] = f;
}

int main() {
    int l[] = {1, 2, 3, 4, 5, 6, 7, 8, 9};
    int i;
    size_t n = 9;
    printf("Original list     : ");
    for (i = 0; i < n; ++i) printf("%d ", l[i]);
    printf("\nShifted left by 3 : ");
    for (i = 0; i < 3; ++i) lshift(l, n);
    for (i = 0; i < n; ++i) printf("%d ", l[i]);
    printf("\n");
    return 0;
}

Python: def rotate(list, n):
    for _ in range(n):
        list.append(list.pop(0))

    return list



def rotate(list, n):
    k = (len(list) + n) % len(list)
    return list[k::] + list[:k:]


list = [1,2,3,4,5,6,7,8,9]
print(list, " => ", rotate(list, 3))
Task: Shift list elements to left by 3
Go: package main

import "fmt"


func lshift(l []int) {
    n := len(l)
    if n < 2 {
        return
    }
    f := l[0]
    for i := 0; i < n-1; i++ {
        l[i] = l[i+1]
    }
    l[n-1] = f
}

func main() {
    l := []int{1, 2, 3, 4, 5, 6, 7, 8, 9}
    fmt.Println("Original list     :", l)
    for i := 0; i < 3; i++ {
        lshift(l)
    }
    fmt.Println("Shifted left by 3 :", l)
}

Python: def rotate(list, n):
    for _ in range(n):
        list.append(list.pop(0))

    return list



def rotate(list, n):
    k = (len(list) + n) % len(list)
    return list[k::] + list[:k:]


list = [1,2,3,4,5,6,7,8,9]
print(list, " => ", rotate(list, 3))
Task: Doubly-linked list_Traversal
C: 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

typedef struct sListEntry {
    const char *value;
    struct sListEntry *next;
    struct sListEntry *prev;
} *ListEntry, *LinkedList;

typedef struct sListIterator{
    ListEntry  link;
    LinkedList head;
} *LIterator;

LinkedList NewList() {
    ListEntry le = malloc(sizeof(struct sListEntry));
    if (le) {
        le->value = NULL;
        le->next = le->prev = NULL;
    }
    return le;
}

int LL_Append(LinkedList ll, const char *newVal) 
{
    ListEntry le = malloc(sizeof(struct sListEntry));
    if (le) {
        le->value = strdup(newVal);
        le->prev = ll->prev;
        le->next = NULL;
        if (le->prev) 
            le->prev->next = le;
        else
            ll->next = le;
        ll->prev = le;
    }
    return (le!= NULL);
}

int LI_Insert(LIterator iter, const char *newVal)
{
    ListEntry crnt = iter->link;
    ListEntry le = malloc(sizeof(struct sListEntry));
    if (le) {
        le->value = strdup(newVal);
        if ( crnt == iter->head) {
            le->prev = NULL;
            le->next = crnt->next;
            crnt->next = le;
            if (le->next)
                le->next->prev = le;
            else 
                crnt->prev = le;
        }
        else {
            le->prev = ( crnt == NULL)? iter->head->prev : crnt->prev;
            le->next = crnt;
            if (le->prev)
                le->prev->next = le;
            else
                iter->head->next = le;
            if (crnt) 
                crnt->prev = le;
            else 
                iter->head->prev = le;
        }
    }
    return (le!= NULL);
}

LIterator LL_GetIterator(LinkedList ll ) 
{
    LIterator liter = malloc(sizeof(struct sListIterator));
    liter->head = ll;
    liter->link = ll;
    return liter;
}

#define LLI_Delete( iter ) \
    {free(iter); \
    iter = NULL;}

int LLI_AtEnd(LIterator iter)
{
    return iter->link == NULL;
}
const char *LLI_Value(LIterator iter)
{
    return (iter->link)? iter->link->value: NULL;
}
int LLI_Next(LIterator iter)
{
    if (iter->link) iter->link = iter->link->next;
    return(iter->link != NULL);
}
int LLI_Prev(LIterator iter)
{
    if (iter->link) iter->link = iter->link->prev;
    return(iter->link != NULL);
}

int main() 
{
    static const char *contents[] = {"Read", "Orage", "Yeller", 
                                     "Glean", "Blew", "Burple"};
    int ix;
    LinkedList ll = NewList();    
    LIterator iter;

    for (ix=0; ix<6; ix++)        
        LL_Append(ll, contents[ix]);

    iter = LL_GetIterator(ll);    
    printf("forward\n");
    while(LLI_Next(iter))         
        printf("value=%s\n", LLI_Value(iter));    
    LLI_Delete(iter);             

    printf("\nreverse\n");
    iter = LL_GetIterator(ll);
    while(LLI_Prev(iter))         
        printf("value=%s\n", LLI_Value(iter));
    LLI_Delete(iter);
                        
    return 0;
}

C++: #include <iostream>
#include <list>

int main ()
{
    std::list<int> numbers {1, 5, 7, 0, 3, 2};
    for(const auto& i: numbers)
        std::cout << i << ' ';
    std::cout << '\n';
}
Task: Doubly-linked list_Traversal
C#: using System;
using System.Collections.Generic;

namespace RosettaCode.DoublyLinkedList
{
    internal static class Program
    {
        private static void Main()
        {
            var list = new LinkedList<char>("hello");

            var current = list.First;
            do
            {
                Console.WriteLine(current.Value);
            } while ((current = current.Next) != null);

            Console.WriteLine();

            current = list.Last;
            do
            {
                Console.WriteLine(current.Value);
            } while ((current = current.Previous) != null);
        }
    }
}

C++: #include <iostream>
#include <list>

int main ()
{
    std::list<int> numbers {1, 5, 7, 0, 3, 2};
    for(const auto& i: numbers)
        std::cout << i << ' ';
    std::cout << '\n';
}
Task: Doubly-linked list_Traversal
C++: #include <iostream>
#include <list>

int main ()
{
    std::list<int> numbers {1, 5, 7, 0, 3, 2};
    for(const auto& i: numbers)
        std::cout << i << ' ';
    std::cout << '\n';
}

Go: package main

import "fmt"

type dlNode struct {
    string
    next, prev *dlNode
}

type dlList struct {
    head, tail *dlNode
}

func (list *dlList) String() string {
    if list.head == nil {
        return fmt.Sprint(list.head)
    }
    r := "[" + list.head.string
    for p := list.head.next; p != nil; p = p.next {
        r += " " + p.string
    }
    return r + "]"
}

func (list *dlList) insertTail(node *dlNode) {
    if list.tail == nil {
        list.head = node
    } else {
        list.tail.next = node
    }
    node.next = nil
    node.prev = list.tail
    list.tail = node
}

func (list *dlList) insertAfter(existing, insert *dlNode) {
    insert.prev = existing
    insert.next = existing.next
    existing.next.prev = insert
    existing.next = insert
    if existing == list.tail {
        list.tail = insert
    }
}

func main() {
    dll := &dlList{}
    fmt.Println(dll)
    a := &dlNode{string: "A"}
    dll.insertTail(a)
    dll.insertTail(&dlNode{string: "B"})
    fmt.Println(dll)
    dll.insertAfter(a, &dlNode{string: "C"})
    fmt.Println(dll)

    
    fmt.Print("From tail:")
    for p := dll.tail; p != nil; p = p.prev {
        fmt.Print(" ", p.string)
    }
    fmt.Println("")
}
Task: Doubly-linked list_Traversal
C++: #include <iostream>
#include <list>

int main ()
{
    std::list<int> numbers {1, 5, 7, 0, 3, 2};
    for(const auto& i: numbers)
        std::cout << i << ' ';
    std::cout << '\n';
}

Java: package com.rosettacode;

import java.util.LinkedList;
import java.util.stream.Collectors;
import java.util.stream.IntStream;

public class DoubleLinkedListTraversing {

  public static void main(String[] args) {

    final LinkedList<String> doubleLinkedList =
        IntStream.range(1, 10)
            .mapToObj(String::valueOf)
            .collect(Collectors.toCollection(LinkedList::new));

    doubleLinkedList.iterator().forEachRemaining(System.out::print);
    System.out.println();
    doubleLinkedList.descendingIterator().forEachRemaining(System.out::print);
  }
}
Task: Doubly-linked list_Traversal
C++: #include <iostream>
#include <list>

int main ()
{
    std::list<int> numbers {1, 5, 7, 0, 3, 2};
    for(const auto& i: numbers)
        std::cout << i << ' ';
    std::cout << '\n';
}

Python: class List:
    def __init__(self, data, next=None, prev=None):
        self.data = data
        self.next = next
        self.prev = prev

    def append(self, data):
        if self.next == None:
            self.next = List(data, None, self)
            return self.next
        else:
            return self.next.append(data)


tail = head = List(10)
for i in [ 20, 30, 40 ]:
    tail = tail.append(i)


node = head
while node != None:
    print(node.data)
    node = node.next


node = tail
while node != None:
    print(node.data)
    node = node.prev
Task: Doubly-linked list_Traversal
C#: using System;
using System.Collections.Generic;

namespace RosettaCode.DoublyLinkedList
{
    internal static class Program
    {
        private static void Main()
        {
            var list = new LinkedList<char>("hello");

            var current = list.First;
            do
            {
                Console.WriteLine(current.Value);
            } while ((current = current.Next) != null);

            Console.WriteLine();

            current = list.Last;
            do
            {
                Console.WriteLine(current.Value);
            } while ((current = current.Previous) != null);
        }
    }
}

Go: package main

import "fmt"

type dlNode struct {
    string
    next, prev *dlNode
}

type dlList struct {
    head, tail *dlNode
}

func (list *dlList) String() string {
    if list.head == nil {
        return fmt.Sprint(list.head)
    }
    r := "[" + list.head.string
    for p := list.head.next; p != nil; p = p.next {
        r += " " + p.string
    }
    return r + "]"
}

func (list *dlList) insertTail(node *dlNode) {
    if list.tail == nil {
        list.head = node
    } else {
        list.tail.next = node
    }
    node.next = nil
    node.prev = list.tail
    list.tail = node
}

func (list *dlList) insertAfter(existing, insert *dlNode) {
    insert.prev = existing
    insert.next = existing.next
    existing.next.prev = insert
    existing.next = insert
    if existing == list.tail {
        list.tail = insert
    }
}

func main() {
    dll := &dlList{}
    fmt.Println(dll)
    a := &dlNode{string: "A"}
    dll.insertTail(a)
    dll.insertTail(&dlNode{string: "B"})
    fmt.Println(dll)
    dll.insertAfter(a, &dlNode{string: "C"})
    fmt.Println(dll)

    
    fmt.Print("From tail:")
    for p := dll.tail; p != nil; p = p.prev {
        fmt.Print(" ", p.string)
    }
    fmt.Println("")
}
Task: Doubly-linked list_Traversal
C#: using System;
using System.Collections.Generic;

namespace RosettaCode.DoublyLinkedList
{
    internal static class Program
    {
        private static void Main()
        {
            var list = new LinkedList<char>("hello");

            var current = list.First;
            do
            {
                Console.WriteLine(current.Value);
            } while ((current = current.Next) != null);

            Console.WriteLine();

            current = list.Last;
            do
            {
                Console.WriteLine(current.Value);
            } while ((current = current.Previous) != null);
        }
    }
}

Python: class List:
    def __init__(self, data, next=None, prev=None):
        self.data = data
        self.next = next
        self.prev = prev

    def append(self, data):
        if self.next == None:
            self.next = List(data, None, self)
            return self.next
        else:
            return self.next.append(data)


tail = head = List(10)
for i in [ 20, 30, 40 ]:
    tail = tail.append(i)


node = head
while node != None:
    print(node.data)
    node = node.next


node = tail
while node != None:
    print(node.data)
    node = node.prev
Task: Doubly-linked list_Traversal
Java: package com.rosettacode;

import java.util.LinkedList;
import java.util.stream.Collectors;
import java.util.stream.IntStream;

public class DoubleLinkedListTraversing {

  public static void main(String[] args) {

    final LinkedList<String> doubleLinkedList =
        IntStream.range(1, 10)
            .mapToObj(String::valueOf)
            .collect(Collectors.toCollection(LinkedList::new));

    doubleLinkedList.iterator().forEachRemaining(System.out::print);
    System.out.println();
    doubleLinkedList.descendingIterator().forEachRemaining(System.out::print);
  }
}

Python: class List:
    def __init__(self, data, next=None, prev=None):
        self.data = data
        self.next = next
        self.prev = prev

    def append(self, data):
        if self.next == None:
            self.next = List(data, None, self)
            return self.next
        else:
            return self.next.append(data)


tail = head = List(10)
for i in [ 20, 30, 40 ]:
    tail = tail.append(i)


node = head
while node != None:
    print(node.data)
    node = node.next


node = tail
while node != None:
    print(node.data)
    node = node.prev
Task: Doubly-linked list_Traversal
Go: package main

import "fmt"

type dlNode struct {
    string
    next, prev *dlNode
}

type dlList struct {
    head, tail *dlNode
}

func (list *dlList) String() string {
    if list.head == nil {
        return fmt.Sprint(list.head)
    }
    r := "[" + list.head.string
    for p := list.head.next; p != nil; p = p.next {
        r += " " + p.string
    }
    return r + "]"
}

func (list *dlList) insertTail(node *dlNode) {
    if list.tail == nil {
        list.head = node
    } else {
        list.tail.next = node
    }
    node.next = nil
    node.prev = list.tail
    list.tail = node
}

func (list *dlList) insertAfter(existing, insert *dlNode) {
    insert.prev = existing
    insert.next = existing.next
    existing.next.prev = insert
    existing.next = insert
    if existing == list.tail {
        list.tail = insert
    }
}

func main() {
    dll := &dlList{}
    fmt.Println(dll)
    a := &dlNode{string: "A"}
    dll.insertTail(a)
    dll.insertTail(&dlNode{string: "B"})
    fmt.Println(dll)
    dll.insertAfter(a, &dlNode{string: "C"})
    fmt.Println(dll)

    
    fmt.Print("From tail:")
    for p := dll.tail; p != nil; p = p.prev {
        fmt.Print(" ", p.string)
    }
    fmt.Println("")
}

Python: class List:
    def __init__(self, data, next=None, prev=None):
        self.data = data
        self.next = next
        self.prev = prev

    def append(self, data):
        if self.next == None:
            self.next = List(data, None, self)
            return self.next
        else:
            return self.next.append(data)


tail = head = List(10)
for i in [ 20, 30, 40 ]:
    tail = tail.append(i)


node = head
while node != None:
    print(node.data)
    node = node.next


node = tail
while node != None:
    print(node.data)
    node = node.prev
Task: Doubly-linked list_Traversal
C#: using System;
using System.Collections.Generic;

namespace RosettaCode.DoublyLinkedList
{
    internal static class Program
    {
        private static void Main()
        {
            var list = new LinkedList<char>("hello");

            var current = list.First;
            do
            {
                Console.WriteLine(current.Value);
            } while ((current = current.Next) != null);

            Console.WriteLine();

            current = list.Last;
            do
            {
                Console.WriteLine(current.Value);
            } while ((current = current.Previous) != null);
        }
    }
}

Java: package com.rosettacode;

import java.util.LinkedList;
import java.util.stream.Collectors;
import java.util.stream.IntStream;

public class DoubleLinkedListTraversing {

  public static void main(String[] args) {

    final LinkedList<String> doubleLinkedList =
        IntStream.range(1, 10)
            .mapToObj(String::valueOf)
            .collect(Collectors.toCollection(LinkedList::new));

    doubleLinkedList.iterator().forEachRemaining(System.out::print);
    System.out.println();
    doubleLinkedList.descendingIterator().forEachRemaining(System.out::print);
  }
}