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RatInAMaze.cpp
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RatInAMaze.cpp
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#include<bits/stdc++.h>
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; //backtracking
return false;
}
return false;
}
int main(){
int n; cin>>n;
int** arr=new int*[n];
for(int i=0;i<n;i++){
arr[i]=new int[n];
}
for(int i=0;i<n;i++){
for(int j=0;j<n;j++){
cin>>arr[i][j];
}
}
cout<<endl;
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;
}
}
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;
}
}
}
//n=5
//INPUT ARRAY
// 1 0 1 0 1
// 1 1 1 1 1
// 0 1 0 1 0
// 1 0 0 1 1
// 1 1 1 0 1
//OUTPUT
// 1 0 0 0 0
// 1 1 1 1 0
// 0 0 0 1 0
// 0 0 0 1 1
// 0 0 0 0 1