Mission 2 - F1: pmurT Ques(1)
P1032 Mission 2 - F1: pmurT Ques(1)
Problem Background
Radar finally gets to the country and is now meeting pmurT. pmurT gives Radar several questions for Radar to answer.
Radar answered all of them. Can you answer it?
Problem Statement
Here’s pmurT’s \(1^{st}\) problem:
Known \(A=x^2+x+1\), given \(A\), find the positive number \(x\). (Keep \(2\) decimal places in output)
Constraints
- \(0 \le A \le 10000\)
- \(A\) is an integer.
Input
\(A\)
Output
\(x\)
If there’s no possible positive number \(x\), print \(-998244353\).
Samples
No samples needed!!!!!
Hint
Draw the function graph of \(A\) and \(x\) (\(x\) -> \(X\)-axis, \(A\) -> \(Y\)-axis):
Just look at its part with positive \(x\)s - can you think of something through it?
信息
- ID
- 1032
- 难度
- 650
- 分类
- (无)
- 标签
- 递交数
- 78
- 已通过
- 11
- 通过率
- 14%
- 上传者