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#include <iostream> using namespace std; int n,m; char mat[1005][1005]; int dp[1005][1005]; int rek(int i, int j) { if(i==(n-1) && j==(m-1)) { return 1; } if(dp[i][j]!=-1) { return dp[i][j]; } int rez=0; int modul=1e9+7; if(mat[i][j+1]!='#' && j+1<m) { rez+=rek(i,j+1); rez%=modul; } if(mat[i+1][j]!='#' && i+1<n) { rez+=rek(i+1,j); rez%=modul; } dp[i][j]=rez; return rez; } int main() { cin>>n>>m; for(int i=0;i<n;i++) { for(int j=0;j<m;j++) { cin>>mat[i][j]; } } for(int i=0;i<n;i++) { for(int j=0;j<m;j++) { dp[i][j]=-1; } } cout<<rek(0,0); return 0; }
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