xdoj 1142: 删除字符

#include<stdio.h> #include<math.h>#include<string.h>#define max(a,b) (a>b)? a : bint main(){    long long a,b,c;    long long d,e,f=4;    while(scanf("%ld %ld %ld",&a,&b,&c)!=EOF)     {        d=b*b-a*c*4;        if(a==0&&b==0&&c!=0||(a!=0&&d<0))        printf("0\n");        else if(a==0&&b!=0||(a!=0&&d==0))        printf("1\n");        else if(a!=0&&d>0)        printf("2\n");        else         printf("inf\n");    }    return 0; }