1010. One-element polynomial derivation (25)--a record of the problem

1010. One-element polynomial derivation (25) time limit of MS
Memory Limit 65536 KB
Code length limit 8000 B
The Standard of the Judgment procedure

The design function asks for the derivative of the unary polynomial. (Note: The first derivative of xn (n is an integer) is n*xn-1. ）

Input format: Enter the polynomial non 0 coefficients and indices (integers with an absolute value of not more than 1000) in an exponential degradation manner. Numbers are separated by spaces.

Output format: The coefficients and indices of the derivative polynomial not 0 items are output in the same format as the input. Numbers are separated by spaces, but there are no extra spaces at the end. Note that the "0 polynomial" index and coefficient are all 0, but the expression is "0 0". Input Sample:

3 4-5 2 6 1-2 0

Output Sample:

12 3-10 1 6 0

//  main.cpp
//  PATBase1010////
Created by Tong on  4/4/16.  copyright©2016 Tong. All rights reserved.

#include <iostream>

using namespace std;

int main (int argc, const char * argv[]) {
    //Insert code here ...
    
    int a, B;
    
    bool A = true;
    
    while (cin>>a>>b) {
        if (b!=0&&a!=0) {
            if (!first) {
                cout<< "";
            }
            cout<<a*b<< "" <<b-1;
            i = false;
        }
    
    if (a) {
        cout<< "0 0";
    }
    
    return 0;
}