| from fractions import Fraction as F |
| segments = [(F(15), F(25), F(1, 5), F(0)), |
| (F(25), F(35), F(0), F(5)), |
| (F(35), None, F(1, 5), F(-2))] |
| b_speed, b_offset = F(3, 10), F(-9, 2) |
| meetings = [] |
| for lo, hi, a_speed, a_offset in segments: |
| t = (b_offset - a_offset) / (a_speed - b_speed) |
| if t >= lo and (hi is None or t <= hi): |
| meetings.append(t) |
| t = min(meetings) |
| seconds = t * 60 |
| assert seconds.denominator == 1 |
| position = b_speed * t + b_offset |
| result = {"seconds_after_A": int(seconds), "seconds_after_B": int(seconds - 900), |
| "distance_km": str(position)} |
| import json |
| print(json.dumps(result, ensure_ascii=False, sort_keys=True)) |
|
|
