PAT甲级 1002
2017-06-14 09:14
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A+B for Polynomials
This time, you are supposed to find A+B where A and B are two polynomials.Input
Each input file contains one test case. Each case occupies 2 lines, and each line contains the information of a polynomial: K N1 aN1 N2 aN2 … NK aNK, where K is the number of nonzero terms in the polynomial, Ni and aNi (i=1, 2, …, K) are the exponents and coefficients, respectively. It is given that 1 <= K <= 10,0 <= NK < … < N2 < N1 <=1000.
Output
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
#include<iostream> #include<stdio.h> const int maxn=1000+1; double a[maxn],b[maxn]; int main(){ int k; scanf("%d",&k); int i; int pos; for(i=0;i<k;i++){ scanf("%d",&pos); scanf("%lf",a+pos); //%f } scanf("%d",&k); for(i=0;i<k;i++){ scanf("%d",&pos); scanf("%lf",b+pos); //%f } int cnt=0; for(i=0;i<maxn;i++){ a[i]+=b[i]; if(a[i]!=0){ cnt++; } } printf("%d",cnt); for(i=maxn-1;i>=0;i--){ if(a[i]!=0){ printf(" %d %.1f",i,a[i]); //printf(" %d %g",i,a[i]); } } return 0; }
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