POJ_1003

#include <stdio.h>
#define PRECISION  0.001
int main()
{
float length = 0.0;
float i = 2.0;
float sum = 0.0;
while(scanf("%f", &length) && length != 0.00)
{
i = 2.0;
sum = 0.0;
while(length - sum > PRECISION)
{
sum += 1 / i;
i++;
}

printf("%.f card(s)/n", i - 2);
}
return 0;
}