pat-B-10,101-yuan polynomial derivation

The design function is to find the derivative of the polynomial of one element. NoteX?N?? (n as integers" for the first derivative of n< Span class= "Mord" >x? n? 1??。 )

Input Format:

Input polynomial non-0 coefficients and exponents in exponential degradation (absolute values are integers not exceeding 1000). The numbers are separated by a space.

output Format:

The coefficients and exponents of the derivative polynomial not 0 are output in the same format as the input. The numbers are separated by a space, but cannot have extra spaces at the end. Note that the exponent and coefficients for the "0 polynomial" are all 0, but are expressed as 0 0 .

Input Sample:

3 4 -5 2 6 1 -2 0

Sample output:

12 3 -10 1 6 0


分析：
　　按照求导公式求即可
　　PS:
　　　　注意判断输入结束条件为：多项式的指数为0
　　　　注意输出格式：末尾没有多余字符

//C + +#include <iostream>using namespacestd;intMain () {intb; intx =1;  while(cin>>a>>b) {    if(b = =0)       Break; if(!x) cout<<" "; Elsex=0; cout<< a*b <<" "<<b-1; }  if(x) cout<<"0 0"; return 0;}

pat-B-10,101-yuan polynomial derivation