PAT Basic Level 1010

#include <stdio.h>
int main ()
{
    int coe;
    int exp;
    int flag = 1;
    while(scanf("%d %d",&coe,&exp) == 2)    //这一条语句好好想想 
    {
        if(exp != 0 )
        {
    
            if(flag == 1)
            {
                printf("%d %d",coe * exp,exp - 1);
                flag = 0;
            }
            else
            {
                printf(" %d %d",coe * exp,exp - 1);
            }
        }
        
    }
    if (flag)
    {
        printf("%d %d",0,0); 
    }
    return 0;
 }