A+B for Polynomials (25)

[编程题]A+B for Polynomials (25)

热度指数：5339 时间限制：C/C++ 1秒，其他语言2秒空间限制：C/C++ 32M，其他语言64M
算法知识视频讲解

This time, you are supposed to find A+B where A and B are two polynomials.

输入描述:

Each input file contains one test case. Each case occupies 2 lines, and each line contains the information of a polynomial:
K N1 a_N1 N2 a_N2 ... NK a_NK, where K is the number of nonzero terms in the polynomial, Ni and a_Ni (i=1, 2, ..., K) are the exponents and coefficients, respectively.  It is given that 1 <= K <= 10，0 <= NK < ... < N2 < N1 <=1000.

输出描述:

For each test case you should output the sum of A and B in one line, with the same format as the input.  Notice that there must be NO extra space at the end of each line.  Please be accurate to 1 decimal place.

示例1

输入

2 1 2.4 0 3.2<br/>2 2 1.5 1 0.5

输出

3 2 1.5 1 2.9 0 3.2

算法知识视频讲解

Python

初心者托奇

a,b = input().split(),input().split()
d = {}
for i in range(1,len(a),2):
    c = eval(a[i])
    d[c] = d[c] + eval(a[i + 1]) if c in d else eval(a[i + 1])
for i in range(1,len(b),2):
    c = eval(b[i])
    d[c] = d[c] + eval(b[i + 1]) if c in d else eval(b[i + 1])

e = [str(len(d))]
for i in sorted(d,reverse = True):
    if d[i]:
        e.append(str(i) + ' ' + '{:.1f}'.format(d[i]))
    else:
        e[0] = str(int(e[0]) - 1)
print(' '.join(e))

发表于 2020-02-07 14:03:16 回复(0)