#include <stdio.h>

i;t;x;y;
f(int s,int*a,int*b){x=*a;y=*b;while(++i<s)x=(y-b[i])?(x*b[i])+(a[i]*y):(x+a[i]),y=(y-b[i])?(b[i]*y):y;
for(i=1;i<=(x<y?x:y);++i)t=(x%i==0&&y%i==00)?i:t;x/=t;y/=t;}

main()
{
	int a[] = { 1, 2, 3, 3, 6 };
	int b[] = { 2, 9, 3, 2, 4 };
	
	f(5,a,b);
	
	printf("%d / %d",x,y);
}