global islands = new int[][] {
                        new int[] {0, 1, 0, 0, 0, 1, 0},
                        new int[] {1, 1, 0, 1, 1, 1, 0},
                        new int[] {1, 0, 0, 0, 0, 0, 0},
                        new int[] {0, 0, 1, 1, 1, 0, 1},
                        new int[] {0, 0, 1, 1, 0, 0, 0},
                        new int[] {0, 0, 0, 1, 0, 0, 0}
                    };

void dfs(int i, int j) {
    if (i >= 0 & i < 6 & j >= 0 & j < 7) {
        if (islands[i][j] != 0) {
            islands[i][j] = 0;
            dfs(i - 1, j);
            dfs(i + 1, j);
            dfs(i, j + 1);
            dfs(i, j - 1);
        }
    }
    return;
}

int program(int argc, string[] argv) {
    var num_islands = 0;

    for (var i = 0; i < 6; i = i + 1;) {
        for (var j = 0; j < 7; j = j + 1;) {
            if (islands[i][j] != 0) {
                num_islands = num_islands + 1;
                dfs(i, j);
            }
        }
    }

    return num_islands;
}