kazuyamaa/multi-language-messages-01 huggingface dataset:
Task: Cholesky decomposition
C: #include <stdio.h>
#include <stdlib.h>
#include <math.h>

double *cholesky(double *A, int n) {
    double *L = (double*)calloc(n * n, sizeof(double));
    if (L == NULL)
        exit(EXIT_FAILURE);

    for (int i = 0; i < n; i++)
        for (int j = 0; j < (i+1); j++) {
            double s = 0;
            for (int k = 0; k < j; k++)
                s += L[i * n + k] * L[j * n + k];
            L[i * n + j] = (i == j) ?
                           sqrt(A[i * n + i] - s) :
                           (1.0 / L[j * n + j] * (A[i * n + j] - s));
        }

    return L;
}

void show_matrix(double *A, int n) {
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++)
            printf("%2.5f ", A[i * n + j]);
        printf("\n");
    }
}

int main() {
    int n = 3;
    double m1[] = {25, 15, -5,
                   15, 18,  0,
                   -5,  0, 11};
    double *c1 = cholesky(m1, n);
    show_matrix(c1, n);
    printf("\n");
    free(c1);

    n = 4;
    double m2[] = {18, 22,  54,  42,
                   22, 70,  86,  62,
                   54, 86, 174, 134,
                   42, 62, 134, 106};
    double *c2 = cholesky(m2, n);
    show_matrix(c2, n);
    free(c2);

    return 0;
}

Python: from __future__ import print_function

from pprint import pprint
from math import sqrt


def cholesky(A):
    L = [[0.0] * len(A) for _ in xrange(len(A))]
    for i in xrange(len(A)):
        for j in xrange(i+1):
            s = sum(L[i][k] * L[j][k] for k in xrange(j))
            L[i][j] = sqrt(A[i][i] - s) if (i == j) else \
                      (1.0 / L[j][j] * (A[i][j] - s))
    return L

if __name__ == "__main__":
    m1 = [[25, 15, -5],
          [15, 18,  0],
          [-5,  0, 11]]
    pprint(cholesky(m1))
    print()
    
    m2 = [[18, 22,  54,  42],
          [22, 70,  86,  62],
          [54, 86, 174, 134],
          [42, 62, 134, 106]]
    pprint(cholesky(m2), width=120)
Task: Cholesky decomposition
Go: package main

import (
    "fmt"
    "math"
)




type symmetric struct {
    order int
    ele   []float64
}

type lower struct {
    order int
    ele   []float64
}



func (s *symmetric) print() {
    const eleFmt = "%10.5f "
    row, diag := 1, 0
    for i, e := range s.ele {
        fmt.Printf(eleFmt, e)
        if i == diag {
            for j, col := diag+row, row; col < s.order; j += col {
                fmt.Printf(eleFmt, s.ele[j])
                col++
            }
            fmt.Println()
            row++
            diag += row
        }
    }
}



func (l *lower) print() {
    const eleFmt = "%10.5f "
    row, diag := 1, 0
    for i, e := range l.ele {
        fmt.Printf(eleFmt, e)
        if i == diag {
            for j := row; j < l.order; j++ {
                fmt.Printf(eleFmt, 0.)
            }
            fmt.Println()
            row++
            diag += row
        }
    }
}



func (a *symmetric) choleskyLower() *lower {
    l := &lower{a.order, make([]float64, len(a.ele))}
    row, col := 1, 1
    dr := 0 
    dc := 0 
    for i, e := range a.ele {
        if i < dr {
            d := (e - l.ele[i]) / l.ele[dc]
            l.ele[i] = d
            ci, cx := col, dc
            for j := i + 1; j <= dr; j++ {
                cx += ci
                ci++
                l.ele[j] += d * l.ele[cx]
            }
            col++
            dc += col
        } else {
            l.ele[i] = math.Sqrt(e - l.ele[i])
            row++
            dr += row
            col = 1
            dc = 0
        }
    }
    return l
}

func main() {
    demo(&symmetric{3, []float64{
        25,
        15, 18,
        -5, 0, 11}})
    demo(&symmetric{4, []float64{
        18,
        22, 70,
        54, 86, 174,
        42, 62, 134, 106}})
}

func demo(a *symmetric) {
    fmt.Println("A:")
    a.print()
    fmt.Println("L:")
    a.choleskyLower().print()
}

Java: import java.util.Arrays;

public class Cholesky {
	public static double[][] chol(double[][] a){
		int m = a.length;
		double[][] l = new double[m][m]; 
		for(int i = 0; i< m;i++){
			for(int k = 0; k < (i+1); k++){
				double sum = 0;
				for(int j = 0; j < k; j++){
					sum += l[i][j] * l[k][j];
				}
				l[i][k] = (i == k) ? Math.sqrt(a[i][i] - sum) :
					(1.0 / l[k][k] * (a[i][k] - sum));
			}
		}
		return l;
	}
	
	public static void main(String[] args){
		double[][] test1 = {{25, 15, -5},
							{15, 18, 0},
							{-5, 0, 11}};
		System.out.println(Arrays.deepToString(chol(test1)));
		double[][] test2 = {{18, 22, 54, 42},
							{22, 70, 86, 62},
							{54, 86, 174, 134},
							{42, 62, 134, 106}};
		System.out.println(Arrays.deepToString(chol(test2)));
	}
}
Task: Cholesky decomposition
Java: import java.util.Arrays;

public class Cholesky {
	public static double[][] chol(double[][] a){
		int m = a.length;
		double[][] l = new double[m][m]; 
		for(int i = 0; i< m;i++){
			for(int k = 0; k < (i+1); k++){
				double sum = 0;
				for(int j = 0; j < k; j++){
					sum += l[i][j] * l[k][j];
				}
				l[i][k] = (i == k) ? Math.sqrt(a[i][i] - sum) :
					(1.0 / l[k][k] * (a[i][k] - sum));
			}
		}
		return l;
	}
	
	public static void main(String[] args){
		double[][] test1 = {{25, 15, -5},
							{15, 18, 0},
							{-5, 0, 11}};
		System.out.println(Arrays.deepToString(chol(test1)));
		double[][] test2 = {{18, 22, 54, 42},
							{22, 70, 86, 62},
							{54, 86, 174, 134},
							{42, 62, 134, 106}};
		System.out.println(Arrays.deepToString(chol(test2)));
	}
}

VB: Function Cholesky(Mat As Range) As Variant

Dim A() As Double, L() As Double, sum As Double, sum2 As Double
Dim m As Byte, i As Byte, j As Byte, k As Byte


    If Mat.Rows.Count <> Mat.Columns.Count Then
        MsgBox ("Correlation matrix is not square")
        Exit Function
    End If
    
    m = Mat.Rows.Count


    ReDim A(0 To m - 1, 0 To m - 1)
    ReDim L(0 To m - 1, 0 To m - 1)
    For i = 0 To m - 1
        For j = 0 To m - 1
            A(i, j) = Mat(i + 1, j + 1).Value2
            L(i, j) = 0
        Next j
    Next i


    Select Case m
        Case Is = 1
            L(0, 0) = Sqr(A(0, 0))
        
        Case Is = 2
            L(0, 0) = Sqr(A(0, 0))
            L(1, 0) = A(1, 0) / L(0, 0)
            L(1, 1) = Sqr(A(1, 1) - L(1, 0) * L(1, 0))
        
        Case Else
            L(0, 0) = Sqr(A(0, 0))
            L(1, 0) = A(1, 0) / L(0, 0)
            L(1, 1) = Sqr(A(1, 1) - L(1, 0) * L(1, 0))
            For i = 2 To m - 1
                sum2 = 0
                For k = 0 To i - 1
                    sum = 0
                    For j = 0 To k
                        sum = sum + L(i, j) * L(k, j)
                    Next j
                    L(i, k) = (A(i, k) - sum) / L(k, k)
                    sum2 = sum2 + L(i, k) * L(i, k)
                Next k
                L(i, i) = Sqr(A(i, i) - sum2)
            Next i
    End Select
    Cholesky = L
End Function
Task: Cholesky decomposition
Go: package main

import (
    "fmt"
    "math"
)




type symmetric struct {
    order int
    ele   []float64
}

type lower struct {
    order int
    ele   []float64
}



func (s *symmetric) print() {
    const eleFmt = "%10.5f "
    row, diag := 1, 0
    for i, e := range s.ele {
        fmt.Printf(eleFmt, e)
        if i == diag {
            for j, col := diag+row, row; col < s.order; j += col {
                fmt.Printf(eleFmt, s.ele[j])
                col++
            }
            fmt.Println()
            row++
            diag += row
        }
    }
}



func (l *lower) print() {
    const eleFmt = "%10.5f "
    row, diag := 1, 0
    for i, e := range l.ele {
        fmt.Printf(eleFmt, e)
        if i == diag {
            for j := row; j < l.order; j++ {
                fmt.Printf(eleFmt, 0.)
            }
            fmt.Println()
            row++
            diag += row
        }
    }
}



func (a *symmetric) choleskyLower() *lower {
    l := &lower{a.order, make([]float64, len(a.ele))}
    row, col := 1, 1
    dr := 0 
    dc := 0 
    for i, e := range a.ele {
        if i < dr {
            d := (e - l.ele[i]) / l.ele[dc]
            l.ele[i] = d
            ci, cx := col, dc
            for j := i + 1; j <= dr; j++ {
                cx += ci
                ci++
                l.ele[j] += d * l.ele[cx]
            }
            col++
            dc += col
        } else {
            l.ele[i] = math.Sqrt(e - l.ele[i])
            row++
            dr += row
            col = 1
            dc = 0
        }
    }
    return l
}

func main() {
    demo(&symmetric{3, []float64{
        25,
        15, 18,
        -5, 0, 11}})
    demo(&symmetric{4, []float64{
        18,
        22, 70,
        54, 86, 174,
        42, 62, 134, 106}})
}

func demo(a *symmetric) {
    fmt.Println("A:")
    a.print()
    fmt.Println("L:")
    a.choleskyLower().print()
}

Python: from __future__ import print_function

from pprint import pprint
from math import sqrt


def cholesky(A):
    L = [[0.0] * len(A) for _ in xrange(len(A))]
    for i in xrange(len(A)):
        for j in xrange(i+1):
            s = sum(L[i][k] * L[j][k] for k in xrange(j))
            L[i][j] = sqrt(A[i][i] - s) if (i == j) else \
                      (1.0 / L[j][j] * (A[i][j] - s))
    return L

if __name__ == "__main__":
    m1 = [[25, 15, -5],
          [15, 18,  0],
          [-5,  0, 11]]
    pprint(cholesky(m1))
    print()
    
    m2 = [[18, 22,  54,  42],
          [22, 70,  86,  62],
          [54, 86, 174, 134],
          [42, 62, 134, 106]]
    pprint(cholesky(m2), width=120)
Task: Cholesky decomposition
Python: from __future__ import print_function

from pprint import pprint
from math import sqrt


def cholesky(A):
    L = [[0.0] * len(A) for _ in xrange(len(A))]
    for i in xrange(len(A)):
        for j in xrange(i+1):
            s = sum(L[i][k] * L[j][k] for k in xrange(j))
            L[i][j] = sqrt(A[i][i] - s) if (i == j) else \
                      (1.0 / L[j][j] * (A[i][j] - s))
    return L

if __name__ == "__main__":
    m1 = [[25, 15, -5],
          [15, 18,  0],
          [-5,  0, 11]]
    pprint(cholesky(m1))
    print()
    
    m2 = [[18, 22,  54,  42],
          [22, 70,  86,  62],
          [54, 86, 174, 134],
          [42, 62, 134, 106]]
    pprint(cholesky(m2), width=120)

VB: Function Cholesky(Mat As Range) As Variant

Dim A() As Double, L() As Double, sum As Double, sum2 As Double
Dim m As Byte, i As Byte, j As Byte, k As Byte


    If Mat.Rows.Count <> Mat.Columns.Count Then
        MsgBox ("Correlation matrix is not square")
        Exit Function
    End If
    
    m = Mat.Rows.Count


    ReDim A(0 To m - 1, 0 To m - 1)
    ReDim L(0 To m - 1, 0 To m - 1)
    For i = 0 To m - 1
        For j = 0 To m - 1
            A(i, j) = Mat(i + 1, j + 1).Value2
            L(i, j) = 0
        Next j
    Next i


    Select Case m
        Case Is = 1
            L(0, 0) = Sqr(A(0, 0))
        
        Case Is = 2
            L(0, 0) = Sqr(A(0, 0))
            L(1, 0) = A(1, 0) / L(0, 0)
            L(1, 1) = Sqr(A(1, 1) - L(1, 0) * L(1, 0))
        
        Case Else
            L(0, 0) = Sqr(A(0, 0))
            L(1, 0) = A(1, 0) / L(0, 0)
            L(1, 1) = Sqr(A(1, 1) - L(1, 0) * L(1, 0))
            For i = 2 To m - 1
                sum2 = 0
                For k = 0 To i - 1
                    sum = 0
                    For j = 0 To k
                        sum = sum + L(i, j) * L(k, j)
                    Next j
                    L(i, k) = (A(i, k) - sum) / L(k, k)
                    sum2 = sum2 + L(i, k) * L(i, k)
                Next k
                L(i, i) = Sqr(A(i, i) - sum2)
            Next i
    End Select
    Cholesky = L
End Function
Task: Cholesky decomposition
C: #include <stdio.h>
#include <stdlib.h>
#include <math.h>

double *cholesky(double *A, int n) {
    double *L = (double*)calloc(n * n, sizeof(double));
    if (L == NULL)
        exit(EXIT_FAILURE);

    for (int i = 0; i < n; i++)
        for (int j = 0; j < (i+1); j++) {
            double s = 0;
            for (int k = 0; k < j; k++)
                s += L[i * n + k] * L[j * n + k];
            L[i * n + j] = (i == j) ?
                           sqrt(A[i * n + i] - s) :
                           (1.0 / L[j * n + j] * (A[i * n + j] - s));
        }

    return L;
}

void show_matrix(double *A, int n) {
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++)
            printf("%2.5f ", A[i * n + j]);
        printf("\n");
    }
}

int main() {
    int n = 3;
    double m1[] = {25, 15, -5,
                   15, 18,  0,
                   -5,  0, 11};
    double *c1 = cholesky(m1, n);
    show_matrix(c1, n);
    printf("\n");
    free(c1);

    n = 4;
    double m2[] = {18, 22,  54,  42,
                   22, 70,  86,  62,
                   54, 86, 174, 134,
                   42, 62, 134, 106};
    double *c2 = cholesky(m2, n);
    show_matrix(c2, n);
    free(c2);

    return 0;
}

VB: Function Cholesky(Mat As Range) As Variant

Dim A() As Double, L() As Double, sum As Double, sum2 As Double
Dim m As Byte, i As Byte, j As Byte, k As Byte


    If Mat.Rows.Count <> Mat.Columns.Count Then
        MsgBox ("Correlation matrix is not square")
        Exit Function
    End If
    
    m = Mat.Rows.Count


    ReDim A(0 To m - 1, 0 To m - 1)
    ReDim L(0 To m - 1, 0 To m - 1)
    For i = 0 To m - 1
        For j = 0 To m - 1
            A(i, j) = Mat(i + 1, j + 1).Value2
            L(i, j) = 0
        Next j
    Next i


    Select Case m
        Case Is = 1
            L(0, 0) = Sqr(A(0, 0))
        
        Case Is = 2
            L(0, 0) = Sqr(A(0, 0))
            L(1, 0) = A(1, 0) / L(0, 0)
            L(1, 1) = Sqr(A(1, 1) - L(1, 0) * L(1, 0))
        
        Case Else
            L(0, 0) = Sqr(A(0, 0))
            L(1, 0) = A(1, 0) / L(0, 0)
            L(1, 1) = Sqr(A(1, 1) - L(1, 0) * L(1, 0))
            For i = 2 To m - 1
                sum2 = 0
                For k = 0 To i - 1
                    sum = 0
                    For j = 0 To k
                        sum = sum + L(i, j) * L(k, j)
                    Next j
                    L(i, k) = (A(i, k) - sum) / L(k, k)
                    sum2 = sum2 + L(i, k) * L(i, k)
                Next k
                L(i, i) = Sqr(A(i, i) - sum2)
            Next i
    End Select
    Cholesky = L
End Function
Task: Cholesky decomposition
Java: import java.util.Arrays;

public class Cholesky {
	public static double[][] chol(double[][] a){
		int m = a.length;
		double[][] l = new double[m][m]; 
		for(int i = 0; i< m;i++){
			for(int k = 0; k < (i+1); k++){
				double sum = 0;
				for(int j = 0; j < k; j++){
					sum += l[i][j] * l[k][j];
				}
				l[i][k] = (i == k) ? Math.sqrt(a[i][i] - sum) :
					(1.0 / l[k][k] * (a[i][k] - sum));
			}
		}
		return l;
	}
	
	public static void main(String[] args){
		double[][] test1 = {{25, 15, -5},
							{15, 18, 0},
							{-5, 0, 11}};
		System.out.println(Arrays.deepToString(chol(test1)));
		double[][] test2 = {{18, 22, 54, 42},
							{22, 70, 86, 62},
							{54, 86, 174, 134},
							{42, 62, 134, 106}};
		System.out.println(Arrays.deepToString(chol(test2)));
	}
}

Python: from __future__ import print_function

from pprint import pprint
from math import sqrt


def cholesky(A):
    L = [[0.0] * len(A) for _ in xrange(len(A))]
    for i in xrange(len(A)):
        for j in xrange(i+1):
            s = sum(L[i][k] * L[j][k] for k in xrange(j))
            L[i][j] = sqrt(A[i][i] - s) if (i == j) else \
                      (1.0 / L[j][j] * (A[i][j] - s))
    return L

if __name__ == "__main__":
    m1 = [[25, 15, -5],
          [15, 18,  0],
          [-5,  0, 11]]
    pprint(cholesky(m1))
    print()
    
    m2 = [[18, 22,  54,  42],
          [22, 70,  86,  62],
          [54, 86, 174, 134],
          [42, 62, 134, 106]]
    pprint(cholesky(m2), width=120)
Task: Nonoblock
C: #include <stdio.h>
#include <string.h>

void nb(int cells, int total_block_size, int* blocks, int block_count,
        char* output, int offset, int* count) {
    if (block_count == 0) {
        printf("%2d  %s\n", ++*count, output);
        return;
    }
    int block_size = blocks[0];
    int max_pos = cells - (total_block_size + block_count - 1);
    total_block_size -= block_size;
    cells -= block_size + 1;
    ++blocks;
    --block_count;
    for (int i = 0; i <= max_pos; ++i, --cells) {
        memset(output + offset, '.', max_pos + block_size);
        memset(output + offset + i, '#', block_size);
        nb(cells, total_block_size, blocks, block_count, output,
           offset + block_size + i + 1, count);
    }
}

void nonoblock(int cells, int* blocks, int block_count) {
    printf("%d cells and blocks [", cells);
    for (int i = 0; i < block_count; ++i)
        printf(i == 0 ? "%d" : ", %d", blocks[i]);
    printf("]:\n");
    int total_block_size = 0;
    for (int i = 0; i < block_count; ++i)
        total_block_size += blocks[i];
    if (cells < total_block_size + block_count - 1) {
        printf("no solution\n");
        return;
    }
    char output[cells + 1];
    memset(output, '.', cells);
    output[cells] = '\0';
    int count = 0;
    nb(cells, total_block_size, blocks, block_count, output, 0, &count);
}

int main() {
    int blocks1[] = {2, 1};
    nonoblock(5, blocks1, 2);
    printf("\n");
    
    nonoblock(5, NULL, 0);
    printf("\n");

    int blocks2[] = {8};
    nonoblock(10, blocks2, 1);
    printf("\n");
    
    int blocks3[] = {2, 3, 2, 3};
    nonoblock(15, blocks3, 4);
    printf("\n");
    
    int blocks4[] = {2, 3};
    nonoblock(5, blocks4, 2);

    return 0;
}

Go: package main

import (
    "fmt"
    "strings"
)

func printBlock(data string, le int) {
    a := []byte(data)
    sumBytes := 0
    for _, b := range a {
        sumBytes += int(b - 48)
    }
    fmt.Printf("\nblocks %c, cells %d\n", a, le)
    if le-sumBytes <= 0 {
        fmt.Println("No solution")
        return
    }
    prep := make([]string, len(a))
    for i, b := range a {
        prep[i] = strings.Repeat("1", int(b-48))
    }
    for _, r := range genSequence(prep, le-sumBytes+1) {
        fmt.Println(r[1:])
    }
}

func genSequence(ones []string, numZeros int) []string {
    if len(ones) == 0 {
        return []string{strings.Repeat("0", numZeros)}
    }
    var result []string
    for x := 1; x < numZeros-len(ones)+2; x++ {
        skipOne := ones[1:]
        for _, tail := range genSequence(skipOne, numZeros-x) {
            result = append(result, strings.Repeat("0", x)+ones[0]+tail)
        }
    }
    return result
}

func main() {
    printBlock("21", 5)
    printBlock("", 5)
    printBlock("8", 10)
    printBlock("2323", 15)
    printBlock("23", 5)
}
Task: Nonoblock
Go: package main

import (
    "fmt"
    "strings"
)

func printBlock(data string, le int) {
    a := []byte(data)
    sumBytes := 0
    for _, b := range a {
        sumBytes += int(b - 48)
    }
    fmt.Printf("\nblocks %c, cells %d\n", a, le)
    if le-sumBytes <= 0 {
        fmt.Println("No solution")
        return
    }
    prep := make([]string, len(a))
    for i, b := range a {
        prep[i] = strings.Repeat("1", int(b-48))
    }
    for _, r := range genSequence(prep, le-sumBytes+1) {
        fmt.Println(r[1:])
    }
}

func genSequence(ones []string, numZeros int) []string {
    if len(ones) == 0 {
        return []string{strings.Repeat("0", numZeros)}
    }
    var result []string
    for x := 1; x < numZeros-len(ones)+2; x++ {
        skipOne := ones[1:]
        for _, tail := range genSequence(skipOne, numZeros-x) {
            result = append(result, strings.Repeat("0", x)+ones[0]+tail)
        }
    }
    return result
}

func main() {
    printBlock("21", 5)
    printBlock("", 5)
    printBlock("8", 10)
    printBlock("2323", 15)
    printBlock("23", 5)
}

Java: import java.util.*;
import static java.util.Arrays.stream;
import static java.util.stream.Collectors.toList;

public class Nonoblock {

    public static void main(String[] args) {
        printBlock("21", 5);
        printBlock("", 5);
        printBlock("8", 10);
        printBlock("2323", 15);
        printBlock("23", 5);
    }

    static void printBlock(String data, int len) {
        int sumChars = data.chars().map(c -> Character.digit(c, 10)).sum();
        String[] a = data.split("");

        System.out.printf("%nblocks %s, cells %s%n", Arrays.toString(a), len);
        if (len - sumChars <= 0) {
            System.out.println("No solution");
            return;
        }

        List<String> prep = stream(a).filter(x -> !"".equals(x))
                .map(x -> repeat(Character.digit(x.charAt(0), 10), "1"))
                .collect(toList());

        for (String r : genSequence(prep, len - sumChars + 1))
            System.out.println(r.substring(1));
    }

    
    static List<String> genSequence(List<String> ones, int numZeros) {
        if (ones.isEmpty())
            return Arrays.asList(repeat(numZeros, "0"));

        List<String> result = new ArrayList<>();
        for (int x = 1; x < numZeros - ones.size() + 2; x++) {
            List<String> skipOne = ones.stream().skip(1).collect(toList());
            for (String tail : genSequence(skipOne, numZeros - x))
                result.add(repeat(x, "0") + ones.get(0) + tail);
        }
        return result;
    }

    static String repeat(int n, String s) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < n; i++)
            sb.append(s);
        return sb.toString();
    }
}
Task: Nonoblock
Go: package main

import (
    "fmt"
    "strings"
)

func printBlock(data string, le int) {
    a := []byte(data)
    sumBytes := 0
    for _, b := range a {
        sumBytes += int(b - 48)
    }
    fmt.Printf("\nblocks %c, cells %d\n", a, le)
    if le-sumBytes <= 0 {
        fmt.Println("No solution")
        return
    }
    prep := make([]string, len(a))
    for i, b := range a {
        prep[i] = strings.Repeat("1", int(b-48))
    }
    for _, r := range genSequence(prep, le-sumBytes+1) {
        fmt.Println(r[1:])
    }
}

func genSequence(ones []string, numZeros int) []string {
    if len(ones) == 0 {
        return []string{strings.Repeat("0", numZeros)}
    }
    var result []string
    for x := 1; x < numZeros-len(ones)+2; x++ {
        skipOne := ones[1:]
        for _, tail := range genSequence(skipOne, numZeros-x) {
            result = append(result, strings.Repeat("0", x)+ones[0]+tail)
        }
    }
    return result
}

func main() {
    printBlock("21", 5)
    printBlock("", 5)
    printBlock("8", 10)
    printBlock("2323", 15)
    printBlock("23", 5)
}

Python: def nonoblocks(blocks, cells):
    if not blocks or blocks[0] == 0:
        yield [(0, 0)]
    else:
        assert sum(blocks) + len(blocks)-1 <= cells, \
            'Those blocks will not fit in those cells'
        blength, brest = blocks[0], blocks[1:]      
        minspace4rest = sum(1+b for b in brest)     
        
        for bpos in range(0, cells - minspace4rest - blength + 1):
            if not brest:
                
                yield [(bpos, blength)]
            else:
                
                
                
                offset = bpos + blength +1
                nonoargs = (brest, cells - offset)  
                
                for subpos in nonoblocks(*nonoargs):
                    
                    rest = [(offset + bp, bl) for bp, bl in subpos]
                    
                    vec = [(bpos, blength)] + rest
                    yield vec

def pblock(vec, cells):
    'Prettyprints each run of blocks with a different letter A.. for each block of filled cells'
    vector = ['_'] * cells
    for ch, (bp, bl) in enumerate(vec, ord('A')):
        for i in range(bp, bp + bl):
            vector[i] = chr(ch) if vector[i] == '_' else'?'
    return '|' + '|'.join(vector) + '|'


if __name__ == '__main__':
    for blocks, cells in (
            ([2, 1], 5),
            ([], 5),
            ([8], 10),
            ([2, 3, 2, 3], 15),
           
           
           
            ([2, 3], 5),
            ):
        print('\nConfiguration:\n    %s 
        print('  Possibilities:')
        for i, vector in enumerate(nonoblocks(blocks, cells)):
            print('   ', pblock(vector, cells))
        print('  A total of %i Possible configurations.' % (i+1))