WOJ-Problem 1004 - Noah's Ark

不知为何，总是输出：Output
Limit Exceeded

#include<iostream>
#include<stdio.h>
#include <math.h>
#include <string>
#define threshod 1e-9
using namespace std;

double change(double num, string c)
{
double k = 1.0;
if (c=="meters")k = 100.0;
if (c=="cubits")k = 45.72;
if (c=="feet") k = 30.48;
if (c=="inches")k = 2.54;
num = num*k;
return num;
}

int main()
{
int i = 0;
string output[10000];
double length=0, width=0, height=0;
//char dlength[20], dwidth[20], dheight[20];
string dlength, dwidth, dheight;
while (1)
{
i++;
cin >> length >> dlength;
cin >> width >> dwidth;
cin >> height >> dheight;
printf("\n");
length=change(length,dlength);
width=change(width,dwidth);
if (fabs(length - width) < threshod) printf("Spin");
else
{
if (fabs((length - 6 * width))<threshod) printf("Excellent");
else printf("Neither");
}
printf("\n\n");
}
return 0;
}