PAT (Advanced Level)1002解

因为最近在刷题库，想想就把本人可以想到的解法写到博客里，作为整理归纳。未必是最优解，还请各位高手多多包涵，能够指点指点。

题目要求
1002 A+B for Polynomials （25 分）
This time, you are supposed to find A+B where A and B are two polynomials.
Input Specification:

Output Specification:

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.
Sample Input:

2 1 2.4 0 3.2
2 2 1.5 1 0.5

Sample Output:

3 2 1.5 1 2.9 0 3.2

解题思路1
采用数组解决
注意事项1

代码部分1

#include
#include
main(){
  float A[1001]={0.0};
  int num,x;
  double y;
//第一个多项式读入 
  scanf("%d",&num); 
  for(int i =0;i=0;i--){
    if(A[i]!=0.0)
    num++;
  } //统计总数
  printf("%d",num );
  for(int i =1000;i>=0;i--){
    if(A[i]!=0){
     printf(" %d",i);
    printf(" %.1lf",A[i]);   	
	}
  } //打印数据  
}

运行结果1

解题思路2
采用map解决
注意事项2
代码2

#include
#include
#include

运行结果2

从运行结果上来看，map的运行速度确实是比数组更慢，原则上应该是优先使用数组，map使用容易超时。