Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Week | Date | Opponent | Result | Attendance |
| --- | --- | --- | --- | --- |
| 1.0 | September 10, 1967 | New York Jets | W 20–17 | 45,748 |
| 2.0 | September 17, 1967 | Houston Oilers | L 20–3 | 41,384 |
| 3.0 | September 24, 1967 | Boston Patriots | L 23–0 | 45,748 |
| 4.0 | October 1, 1967 | San Diego Chargers | L 37–17 | 39,310 |
| 5.0 | October 8, 1967 | at Denver Broncos | W 17–16 | 35,188 |
| 6.0 | October 15, 1967 | at Oakland Raiders | L 24-20 | 45,758 |
| 7.0 | Bye | Bye | Bye | Bye |
| 8.0 | October 29, 1967 | at Houston Oilers | L 10–3 | 30,060 |
| 9.0 | November 5, 1967 | Miami Dolphins | W 35–13 | 31,622 |
| 10.0 | November 12, 1967 | at New York Jets | L 20–10 | 62,671 |
| 11.0 | November 19, 1967 | Denver Broncos | L 21–20 | 30,891 |
| 12.0 | November 26, 1967 | at Miami Dolphins | L 17–14 | 27,050 |
| 13.0 | December 3, 1967 | at Kansas City Chiefs | L 23–13 | 41,943 |
| 14.0 | December 9, 1967 | at Boston Patriots | W 44–16 | 20,627 |
| 15.0 | Bye | Bye | Bye | Bye |
| 16.0 | December 24, 1967 | at Oakland Raiders | L 28–21 | 30,738 |
Question:
What is the total number of weeks that the buffalo bills played against the San Diego Chargers?
Answer:
4.0