【2020年第二屆“網鼎杯”網絡安全大賽青龍組】Crypto boom

本文轉載自查看原文 2020-05-10 20:49 2310 網鼎杯2020青龍組部分wp

繼續

輸入en5oy

網站 https://zs.symbolab.com/solver/pre-calculus-system-of-equations-calculator/

z=31,y=68, x=74

依次輸入，得下圖

咋辦，寫腳本

 1 import math #pipi
 2 
 3 def quadratic(a, b, c):
 4     if a == 0:
 5         if b == 0:
 6             if c == 0:
 7                 print('方程有任意解')
 8             else:
 9                 print('方程無解')
10         else:
11             x = -c / b
12             print('方程有解：x=%.2f' % x)
13     else:
14         q = b * b - 4 * a * c
15         if q > 0:
16             x1 = (-b + math.sqrt(q)) / a / 2
17             x2 = (-b - math.sqrt(q)) / a / 2
18             print("一元二次方程的解為x1=%.2f，x2=%.2f" % (x1, x2))
19             return ()
20         elif q == 0:
21             x1 = -b / a / 2
22             x2 = x1
23             print("一元二次方程的解相同，x1=x2=%.2f" % (x1))
24             return x1, x2
25         else:
26             pass
27             print("一元二次方程無解")
28             return ()
29 print('input a,b,c :')
30 a = float(input('a:'))
31 b = float(input('b:'))
32 c = float(input('c:'))
33 q = quadratic(a, b, c)