Shared code

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define INF 999999999999999999

ll N;
char s[1005][1005];
ll arr[1005][1005];

ll path(ll i,ll j)
{
    if(s[i][j]=='*')
    {
        return 0;
    }
    if(i==N&&j==N)
    {
        return 1;
    }
    if(i>N||j>N)
    {
        return 0;
    }
    if(arr[i][j]!=-1)
    {
        arr[i][j]%=10000007;
        return arr[i][j];
    }
    ll res1=path(i,j+1);
    //res1=res1%10000007;
    ll res2=path(i+1,j);
    //res2=res2%10000007;
    arr[i][j]=res1+res2;
    arr[i][j]%=10000007;
    return arr[i][j];
}

void solve()
{
    ll i,j,k,m;
    cin>>N;
    for(i=1;i<=N;++i)
    {
        for(j=1;j<=N;++j)
        {
            cin>>s[i][j];
        }
    }
    memset(arr,-1,sizeof(arr));
    cout<<path(1,1)<<endl;
    return ;
}

int main()
{
    ll i,j,k,n,m,t;
    solve();
    return 0;
}