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  1. #include <bits/stdc++.h>
  2. #define N 1000000000
  3. #define ll long long
  4. using namespace std;
  5.  
  6. int a[11][11]={},n,ok=0;
  7. int s[1000];
  8.  
  9. void Try(int i,int j,int pos){
  10. 	if(i==n-1 && j==n-1){
  11. 		for(int i=0;i<pos;++i){
  12.              if(s[i]==0) cout <<'D';
  13.             if(s[i]==1) cout <<'L';
  14.             if(s[i]==2) cout <<'R';
  15.             if(s[i]==3) cout <<'U';
  16.         }
  17.         cout <<" ";
  18. 		ok=1;
  19. 		return;
  20. 	}
  21. 	if(i<n-1 && a[i+1][j]==1){ // check down
  22. 		a[i+1][j]=0;
  23. 		s[pos]=0;
  24. 		Try(i+1,j,pos+1);
  25. 		a[i+1][j]=1;
  26. 	}
  27. 	if(j<n-1 && j>0 && a[i][j-1]==1){ // check left
  28. 		a[i][j-1]=0;
  29. 		s[pos]=1;
  30. 		Try(i,j-1,pos+1);
  31. 		a[i][j-1]=1;
  32. 	}
  33. 	if(j<n-1 && a[i][j+1]==1){ // check right
  34. 		a[i][j+1]=0;
  35. 		s[pos]=2;
  36. 		Try(i,j+1,pos+1);
  37. 		a[i][j+1]=1;
  38. 	}
  39. 	if(i<n-1 && i>0 && a[i-1][j]==1){ //check up
  40. 		a[i-1][j]=0;
  41. 		s[pos]=3;
  42. 		Try(i-1,j,pos+1);
  43. 		a[i-1][j]=1;
  44. 	}
  45. }
  46.  
  47. int main(){
  48.     //freopen("input.txt","r",stdin);
  49. 	int t; cin>>t;
  50. 	while(t--){
  51. 		cin>>n;
  52. 		for(int i=0;i<n;i++)
  53. 			for(int j=0;j<n;++j) cin>>a[i][j];
  54. 		for(int i=0;i<n;i++){
  55. 			for(int j=0;j<n;++j){
  56. 				cout << a[i][j]<<" ";
  57. 			}
  58. 			cout << endl;
  59. 		}
  60. 		if(a[0][0]==0||a[n-1][n-1]==0) cout<<-1;
  61. 		else{
  62. 			Try(0,0,0);
  63. 			if(ok==0) cout<<-1;
  64. 		}
  65. 		ok=0;
  66. 		cout<<endl;
  67. 		//s="";
  68. 	}	
  69. }
Success #stdin #stdout 0s 4512KB
comments (?)
stdin
copy 
3
4
1 0 0 0
1 1 0 1
0 1 0 0
0 1 1 1
4
1 0 0 0
1 1 0 1
1 1 0 0
0 1 1 1
5
1 0 0 0 0
1 1 1 1 1
1 1 1 0 1
0 0 0 0 1
0 0 0 0 1
stdout
copy 
1 0 0 0 
1 1 0 1 
0 1 0 0 
0 1 1 1 
DRDDRR 
1 0 0 0 
1 1 0 1 
1 1 0 0 
0 1 1 1 
DDRDRR DRDDRR 
1 0 0 0 0 
1 1 1 1 1 
1 1 1 0 1 
0 0 0 0 1 
0 0 0 0 1 
DDRRURRDDD DDRURRRDDD DRDRURRDDD DRRRRDDD
https://ideone.com/dD7c8I
language:
C++ (gcc 8.3)
created:
4 years ago
visibility:
public

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