bug in code

#include <iostream>
#include <bits/stdc++.h>
using namespace std;

bool Possible(char chess[][10], int row, int col, int n)
{
    //checking in left diagonal

    int i,j;
    i=row-1;
    j=col-1;

    while(i>=0 && j>=0)
    {
        if(chess[i][j]=='Q')
            return false;
        i--;
        j--;
    }

    i=row-1;
    j=col+1; // see in ur code

    while(i>=0 && j<n)
    {
        if(chess[i][j]=='Q')
            return false;
        i--;
        j++;
    }

    i = row-1;
    j = col;

    while(i>=0)
    {
        if(chess[i][j]=='Q')
            return false;

        i--;
    }

    return true;
}

void placeNQueens(char chess[][10], int row,int n)
{
    if(row==n)
    {
        for(int i=0 ; i<n ; i++)
        {
            for(int j=0 ; j<n ; j++)
                cout<<chess[i][j]<<"\t";
            cout<<"\n";
        }
        cout<<"\n";
        return;
    }

    for(int col=0 ; col<n ; col++)
    {
        // first check is it empty place or not
        if(chess[row][col]=='-' and Possible(chess,row,col,n)) // see in ur code
        {
            chess[row][col] = 'Q';
            placeNQueens(chess,row+1,n);
            chess[row][col] = '-';
        }
    }
}

void placeNQueens(int n)
{
    char chess[10][10];
    memset(chess,'-',sizeof chess);
    placeNQueens(chess,0,n);
}

int main()
{
    int n;
    // may be multiple testcase(question setter issue)
    while(cin>>n){

    if(n<=3 && n!=1)
        cout<<"Not Possible"<<"\n";
    else
        placeNQueens(n);
    }

}