PAT-1010 一元多项式求导

#include <iostream>
#include <cstdio>
#include <cstring>
#include <cmath>
using namespace std;

#define MAX 1000
int xishu[MAX],zhishu[MAX];
int main()
{
//freopen("in.txt", "r", stdin);
//freopen("out.txt", "w", stdout);
int m = 0, n = 0, i= 0;
while (scanf("%d%d", &m, &n) != EOF)
{
if (n != 0)
{
xishu[i] = m, zhishu[i] = n;
xishu[i] = xishu[i]*zhishu[i];
if (zhishu[i] != 0)
zhishu[i]--;
i++;
}
}

for (int j = 0; j < i; j++)
{

cout << xishu[j] << " ";
cout << zhishu[j];
if (j != i-1)
cout << " ";
}

if (i == 0)
cout << "0 0";

return 0;
}