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BackT1.cpp
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BackT1.cpp
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#include<iostream>
using namespace std;
bool isSafe(int** arr,int x,int y,int n)
{
if(x<n && y<n && arr[x][y]==1){
return true;
}
return false;
}
bool ratInMaze(int** arr,int x,int y,int n,int** solArr) {
if(x==n-1 && y==n-1) {
solArr[x][y]=1;
return true;
}
if(isSafe(arr,x,y,n)) {
solArr[x][y] = 1;
if(ratInMaze(arr,x+1,y,n,solArr)) {
return true;
}
if(ratInMaze(arr,x,y+1,n,solArr)) {
return true;
}
solArr[x][y]=0;
return false;
}
return false;
}
int main()
{
int n;
cout<<"Enter the number. \n";
cin>>n;
int** arr=new int*[n];
for(int i=0;i<n;i++) {
arr[i]=new int[n];
}
cout<<"Enter the elements. \n";
for(int i=0;i<n;i++) {
for(int j=0;j<n;j++) {
cin>>arr[i][j];
}
}
int** solArr=new int*[n];
for(int i=0;i<n;i++) {
solArr[i]=new int[n];
for(int j=0;j<n;j++) {
solArr[i][j]=0;
}
}
cout<<"Ans: \n";
if(ratInMaze(arr,0,0,n,solArr)) {
for(int i=0;i<n;i++) {
for(int j=0;j<n;j++) {
cout<<solArr[i][j]<<" ";
}cout<<endl;
}
}
return 0;
}