1010 一元多项式求导 （25 分）

Posted 2021-02-07 yaxadu

#include<iostream>
using namespace std;
int main() {
    int a, b, flag = 0;
    while (cin >> a >> b) {
        if (flag == 1 && b !=0) cout << " ";
        if (b != 0) {
            cout << a * b << " " << b - 1;
            flag = 1;
        }
    }
    if (flag == 0) cout << "0 0";
    return 0;
}