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

   printf("\n");

    return 0;
}

C++: #include<bits/stdc++.h>
using namespace std;
string side[4],Longitudinal[5];
int mox[2][2]={{1,-1},{0,-1}},moy[2][2]={{-1,1},{-1,0}};
char str[5]="URDL";
void serch(int x,int y,int then)
{
    if(then==-1)then=3;
    if(!x&&!y){
        cout<<endl;
        exit(0);
    }
    for(int i=0;i<4;i++){
        int now=(then+i)%4,ka=now/2;
        if(!(now%2)&&y+moy[0][ka]<5&&y+moy[0][ka]>-1&&side[y+moy[1][ka]][x]=='1'){
            cout<<str[now];
            serch(x,y+moy[0][ka],now-1);
        }
        if(now%2&&x+mox[0][ka]<5&&x+mox[0][now/2]>-1&&Longitudinal[y][x+mox[1][ka]]=='1'){
            cout<<str[now];
            serch(x+mox[0][ka],y,now-1);
        }
    }
}
int main()
{
    for(int i=0;i<4;i++)cin>>Longitudinal[i]>>side[i];
    cin>>Longitudinal[4];
    cout<<"R";
    serch(1,0,0);
}

C++: #include <iostream>
#include <vector>
using namespace std;
int dx[4] = {1, 0, -1, 0};
int dy[4] = {0, 1, 0, -1};
char go[5] = "RDLU";

bool cangocw(int y, int x, int dir, vector<string> &s){
    if(dir%2==0){
        return s[2*y +1][x +1-(dir/2)] == '0';
    }else{
        return s[2*y +(1-dir/2)*2][x+1] == '0';
    }
}

int main(){
    vector<string> s(11);
    s[0] = s[10] = "0000000";
    for(int i=1; i<=9; i++){
        cin >> s[i];
        s[i] = "0" + s[i] + "0";
    }
    int dir=0;
    int x=0, y=0;
    string ans = "";
    
    do{
        if(cangocw(y, x, dir, s)){
            dir = (dir+1)%4;
            continue;
        }
        x += dx[dir];
        y += dy[dir];
        ans += go[dir];
        dir = (dir+3)%4;
    }while(!(x==0 && y==0 && dir==0));
    cout << ans << endl;
    return 0;
}