Rat in a maze problem using backtracking

CPP/Rat in a maze problem using backtracking

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+/* C++ program for rat in a maze problem */
+
+#include<iostream>
+
+using namespace std;
+
+bool isSafe(int r,int c,int n,int **maze)
+
+{
+
+ if( r < 0 || r >= n )
+
+ return false;
+
+ if( c < 0 || c >= n )
+
+ return false;
+
+ if(maze[r][c])
+
+ return true;
+
+ return false;
+
+}
+
+bool solvemaze(int ** maze,int i,int j,int ** soln,int n)
+
+{
+
+ if(i == n-1 && j == n-1)
+
+ {
+
+ soln[i][j]=1;
+
+ return true;
+
+ }
+
+ if(isSafe(i,j,n,maze))
+
+ {
+
+ soln[i][j]=1;
+
+ if(solvemaze(maze,i+1,j,soln,n))
+
+ return true;
+
+ if(solvemaze(maze,i,j+1,soln,n))
+
+ return true;
+
+ soln[i][j]=0;
+
+ }
+
+ return false;
+
+}
+
+int main()
+
+{
+
+ int n;
+
+ cin>>n;
+
+ int** maze = new int*[n];
+
+ for(int i = 0; i < n; ++i)
+
+ maze[i] = new int[n];
+
+ int** soln = new int*[n];
+
+ for(int i = 0; i < n; ++i)
+
+ soln[i] = new int[n];
+
+ for(int i=0;i<n;i++)
+
+ {
+
+ for(int j=0;j<n;j++)
+
+ {
+
+ cin>>maze[i][j];
+
+ soln[i][j]=0;
+
+ }
+
+ }
+
+ if(solvemaze(maze,0,0,soln,n))
+
+ {
+
+ for(int i=0;i<n;i++)
+
+ {
+
+ for(int j=0;j<n;j++)
+
+ cout<<soln[i][j]<<" ";
+
+ cout<<endl;
+
+ }
+
+ }
+
+ else
+
+ {
+
+cout<<"-1";
+
+ }
+
+}