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++: #define _USE_MATH_DEFINES
 
#include <iostream>
#include <cstdio>
#include <algorithm>
#include <string>
#include <vector>
#include <cmath>

using namespace std;

char tate[4][5];
char yoko[5][4];
bool flag = false;

void test(int x, int y, int j){
	//cout<<endl;
	//cout<<x<<" "<<y<<" "<<endl;
	int i;
	//cin>>i;
	if(x==0&&y==0){
		//cout<<endl;
		return;
	}

	if(j==0){                                  //右に動いた時
		if(x-1>=0 && tate[x-1][y]=='1'){       //行き止まり　上に
			cout<<"U";
			test(x-1, y, 1);
		}
		else if(y+1<5 && yoko[x][y]=='1'){     //右に行ける
			cout<<"R";
			test(x, y+1, 0);                   
		}
		else if(x+1<5 && tate[x][y]=='1'){     //行き止まり　下に
			cout<<"D";
			test(x+1, y, 3);    //下に
		}
	}
	else if(j==1){                             //上に動いた時
		if(y-1>=0 && yoko[x][y-1]=='1'){       //行き止まり　左に
			cout <<"L";
			test(x, y-1, 2);
		}
		else if(x-1>=0 && tate[x-1][y]=='1'){  //上に行ける
			cout <<"U";
			test(x-1, y, 1);
		}
		else if(y+1<5 && yoko[x][y]=='1'){     //行き止まり　右に
			cout <<"R";
			test(x, y+1, 0);
		}
	}
	else if(j==2){                             //左に動いた時
		if(x+1<5 && tate[x][y]=='1'){          //行き止まり　下に
			cout<<"D";
			test(x+1, y, 3);
		}
		else if(y-1>=0 && yoko[x][y-1]=='1'){  //左に行けるなら
			cout<<"L";
			test(x, y-1, 2);
		}
		else if(x-1>=0 && tate[x-1][y]=='1'){  //行き止まり　上に
			cout<<"U";
			test(x-1, y, 1);
		}
	}
	else if(j==3){                             //下に動いた時
		if(y+1<5 && yoko[x][y]=='1'){          //行き止まり　右に
			cout <<"R";
			test(x, y+1, 0);
		}
		else if(x+1<5 && tate[x][y]=='1'){     //下に行けるなら
			cout <<"D";
			test(x+1, y, 3);
		}
		else if(y-1>=0 && yoko[x][y-1]=='1'){  //行き止まり　左に
			cout <<"L";
			test(x, y-1, 2);
		}
	}
}

int main(){

	for(int i=0;i<4;i++){
		cin >> yoko[i][0] >> yoko[i][1] >> yoko[i][2] >> yoko[i][3];
		cin >> tate[i][0] >> tate[i][1] >> tate[i][2] >> tate[i][3] >> tate[i][4];
	}
	cin >> yoko[4][0] >> yoko[4][1] >> yoko[4][2] >> yoko[4][3];
	
	cout << "R";
	test(0, 1, 0);
	cout << endl;

	return 0;
}

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

   printf("\n");

    return 0;
}