Go: package main

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

var points [5][5][4]bool

var scanner = bufio.NewScanner(os.Stdin)

func main() {
	for i := 0; i < 9; i++ {
		y := i/2
		if i%2 == 0 {
			scanner.Scan()
			info := strings.Split(scanner.Text(), "")
			for k := range info {
				e, _ := strconv.Atoi(info[k])
				if e != 0 {
					points[y][k][1], points[y][k+1][3] = true, true
				}
			}
		} else {
			scanner.Scan()
			info := strings.Split(scanner.Text(), "")
			for k := range info {
				e, _ := strconv.Atoi(info[k])
				if e != 0 {
					points[y][k][2], points[y+1][k][0] = true, true
				}
			}
		}
	}
	x := 1
	y := 0
	dir := 1
	dx := []int{0, 1, 0, -1}
	dy := []int{-1, 0, 1, 0}
	ds := "URDL"
	fmt.Printf("%s", string(ds[dir]))
	for !(x == 0 && y == 0) {
		if points[y][x][(dir+3)%4] {
			dir = (dir+3)%4
		} else if points[y][x][dir] {

		} else if points[y][x][(dir+1)%4] {
			dir = (dir+1)%4
		} else {
			dir = (dir+2)%4
		}
		x += dx[dir]
		y += dy[dir]
		fmt.Printf("%s", string(ds[dir]))
	}
	fmt.Println()
}

C++: #include <stdio.h>
#include<math.h>
#include <algorithm>
#include <stack>
using namespace std;

bool rangeCheck(int row, int col){
    if(row % 2 == 0){
        if(row >= 0 && row <= 8 && col >= 0 && col <= 3)return true;
        else{
            return false;
        }
    }else{
        if(row >= 0 && row <= 8 && col >= 0 && col <= 4)return true;
        else{
            return false;
        }
    }
}

int main(){
    int checkTable[9][5][4],row,col;
    char array[9][6];

    for(int i = 0; i < 9; i++){
        for(int k=0; k < 5; k++){
            for(int p=0;p<4;p++){
            	checkTable[i][k][p] = 0;
            }
        }
    }

    for(int i=0;i < 9; i++){
        scanf("%s",array[i]);
    }

    printf("R");
    char current = 'R';

    checkTable[0][0][1] = 1;

    row = 0,col = 0;

    while(true){
        switch(current){
        case 'L':
            if(rangeCheck(row,col-1)&&checkTable[row][col-1][0] == 0 && array[row][col-1] == '1'){
                printf("L");
                checkTable[row][col-1][0] = 1;
                col = col-1;
            }else if(rangeCheck(row+1,col)&&checkTable[row+1][col][3] == 0 && array[row+1][col] == '1'){
                printf("D");
                checkTable[row+1][col][3] = 1;
                current = 'D';
                row = row+1;
            }else if(rangeCheck(row-1,col)&&checkTable[row-1][col][2] == 0 && array[row-1][col] == '1'){
                printf("U");
                checkTable[row-1][col][2] = 1;
                current = 'U';
                row = row-1;
            }else{
                printf("R");
                current = 'R';
            }
            break;
        case 'R':
            if(rangeCheck(row,col+1)&&checkTable[row][col+1][1] == 0 && array[row][col+1] == '1'){
                printf("R");
                checkTable[row][col+1][1] = 1;
                col = col+1;
            }else if(rangeCheck(row-1,col+1)&&checkTable[row-1][col+1][2] == 0 && array[row-1][col+1] == '1'){
                printf("U");
                checkTable[row-1][col+1][2] = 1;
                current = 'U';
                row = row-1;
                col = col+1;
            }else if(rangeCheck(row+1,col+1)&&checkTable[row+1][col+1][3] == 0 && array[row+1][col+1] == '1'){
                printf("D");
                checkTable[row+1][col+1][3] = 1;
                current = 'D';
                row = row+1;
                col = col+1;
            }else{
                printf("L");
                current = 'L';
            }
            break;
        case 'U':
            if(rangeCheck(row-2,col)&&checkTable[row-2][col][2] == 0 && array[row-2][col] == '1'){
                printf("U");
                checkTable[row-2][col][2] = 1;
                row = row - 2;
            }else if(rangeCheck(row-1,col-1)&&checkTable[row-1][col-1][0] == 0 && array[row-1][col-1] == '1'){
                printf("L");
                checkTable[row-1][col-1][0] = 1;
                current = 'L';
                row = row-1;
                col = col-1;
            }else if(rangeCheck(row-1,col)&&checkTable[row-1][col][1] == 0 && array[row-1][col] == '1'){
                printf("R");
                checkTable[row-1][col][1] = 1;
                current = 'R';
                row = row-1;
            }else{
               printf("D");
               current = 'D';
            }
            break;
        case 'D':
            if(rangeCheck(row+2,col)&&checkTable[row+2][col][3] == 0 && array[row+2][col] == '1'){
                printf("D");
                checkTable[row+2][col][3] = 1;
                row = row+2;
            }else if(rangeCheck(row+1,col)&&checkTable[row+1][col][1] == 0 && array[row+1][col] == '1'){
                printf("R");
                checkTable[row+1][col][1] = 1;
                current = 'R';
                row = row+1;
            }else if(rangeCheck(row+1,col-1)&&checkTable[row+1][col-1][0] == 0 && array[row+1][col-1] == '1'){
                printf("L");
                checkTable[row+1][col-1][0] = 1;
                current = 'L';
                row = row +1;
                col = col -1;
            }else{
            	printf("U");
            	current = 'U';
            }
            break;
        }
        if(row == 0 && col == 0)break;
    }

   printf("\n");

    return 0;
}

C++: #include <iostream>
#include <string>
using namespace std;

int i, j, a[6][6] = {}, b[6][5] = {};
string output = "";

int right(), left(), up(), down();

int right(){
	output += "R";
	if(b[i-1][j] == 1){
		i--;
		up();
	}
	else if(a[i][j+1] == 1){
		j++;
		right();
	}
	else if (a[i][j + 1] == 2) { output += "R"; }
	else {
		down();
	}
	return 0;
}

int left(){
	output += "L";
	if (b[i][j-1] == 1) {
		j--;
		down();
	}
	else if (a[i][j-1] == 1) {
		j--;
		left();
	}
	else if (a[i][j - 1] == 2) { output += "L"; }
	else {
		i--;
		j--;
		up();
	}
	return 0;
}

int up(){
	output += "U";
	if (a[i][j] == 1) {
		left();
	}
	else if (a[i][j] == 2) { output = "L"; }
	else if (b[i-1][j] == 1) {
		i--;
		up();
	}
	else if (a[i][j + 1] == 2) { output = "U"; }
	else {
		j++;
		right();
	}
	return 0;
}

int down(){
	output += "D";
	if (a[i+1][j+1] == 1) {
		i++;
		j++;
		right();
	}
	else if (a[i + 1][j + 1] == 2) {  }
	else if (b[i + 1][j] == 1) {
		i++;
		down();
	}
	else if (a[i + 1][j] == 2) { output = "L"; }
	else {
		i++;
		left();
	}
	return 0;
}

int main(){
	string input, k;
	for(i = 1; i<10;i++){
		getline(cin, input);
		if (input.size() != 4) {
			for(int j= 0;j<5;j++){
				k = input[j];
				b[i / 2][j] = stoi(k);
			}
		}
		else{
			for(int j = 1;j<5;j++){
				k = input[j-1];
				a[(i + 1)/ 2][j] = stoi(k);
			}
		}

	}

	a[1][1] = 2;
	i = 1;
	j = 1;
	right();
	cout << output << endl;
	return 0;
}