- Time limit: 1.00 s
- Memory limit: 512 MB
You throw a dice n times, and every throw produces an outcome between 1 and 6. What is the probability that the sum of outcomes is between a and b?
The only input line contains three integers n, a and b.
Print the probability rounded to six decimal places (rounding half to even).
- 1 \le n \le 100
- 1 \le a \le b \le 6n
2 9 10