#2988. C++-初识C++-设置变量a=5.5,b=6.7,c=9.3, 输出式子(-b+4ac)/4*a的值

C++-初识C++-设置变量a=5.5,b=6.7,c=9.3, 输出式子(-b+4ac)/4*a的值

Background

Description

设置变量a=5.5,b=6.7,c=9.3, 输出式子(-b+4ac)/4*a的值

Format

Input

Output

Samples


272.113

Limitation

1s, 1024KiB for each test case.

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