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#include <iostream>
#include "dzialka.h"
#include "message.h"
using namespace std;

const int N = 3002;

int field[N][N];
long long sum[N][N];
int height, width;

int main() {
    ios_base::sync_with_stdio(0);

    if (MyNodeId() == 0) {
        height = GetFieldHeight();
        width = GetFieldWidth();

        for (int i = 0; i < width; i++) {
            for (int j = 0; j < height; j++) {
                field[i][j] = IsUsableCell(j, i);
            }
        }

        for (int i = width - 1; i >= 0; i--) {
            for (int j = height - 1; j >= 0; j--) {
                if (field[i][j]) {
                    sum[i][j] = sum[i + 1][j] + sum[i][j + 1] + 1;

                    if (sum[i + 1][j] != 0 || sum[i][j + 1] != 0) {
                        sum[i][j] -= sum[i + 1][j + 1];
                    }
                }
            }
        }

        for (int i = width - 1; i >= 0; i--) {
            for (int j = height - 1; j >= 0; j--) {
                if (field[i][j]) {
                    sum[i][j] += sum[i + 1][j] + sum[i][j + 1] - sum[i + 1][j + 1];
                }
                else {
                    sum[i][j] = sum[i + 1][j] + sum[i][j + 1] - sum[i + 1][j + 1];
                }
            }
        }

        cout << sum[0][0];
    }

    return 0;
}