Programming_info/Back-track.cpp at master · bosedipayan/Programming_info · GitHub

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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** sol){

    if(x==n-1 || y==n-1){
        sol[x][y]=1;
        return true;
    }

    if(isSafe(arr,x,y,n)){
        sol[x][y]=1;

        if(arr,x+1,y,n,sol){
            return true;
        }

        if(arr,x,y+1,n,sol){
            return true;
        }

        sol[x][y]=0;
        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];
        }
    }


    int** sol=new int*[n];
    for(int i=0;i<n;i++){
        sol[i]=new int[n];

        for(int j=0;j<n;j++){
            sol[i][j]=0;
        }
    }

    if(ratinMaze(arr,0,0,n,sol)){
        for(int i=0;i<n;i++){
        for(int j=0;j<n;j++){
            cout<<sol[i][j]<<" ";
        }
        cout<<endl;
    }

    }


}