#SDNU1079. 复数
复数
Description
计算复数乘法
Format
Input
一行内四个整数
Output
一行,的结果 我相信不会有人写出这样的东西
Samples
2 -1 1 2
4+3i
计算复数乘法(a+bi)∗(c+di)
一行内四个整数a,b,c,d(a,b,c,d均小于1000)
一行,(a+bi)∗(c+di)的结果 我相信不会有人写出0+0i这样的东西
2 -1 1 2
4+3i
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