#include<bits/stdc++.h>
#define LL long long
using namespace std;
inline LL read(){
	int x=0,f=1;
	char ch=getchar();
	while(ch<'0'||ch>'9'){
		if(ch=='-') f=-1;
		ch=getchar();
	}
	while(ch>='0'&&ch<='9'){
		x=(x<<1)+(x<<3)+(ch^48);
		ch=getchar();
	}
	return x*f;
}
LL gcd(LL a,LL b){
	if(b==0) return a;
	return gcd(b,a%b);
}
int main(){
//	freopen("P8584.in","r",stdin);
//	freopen("P8584.out","w",stdout);
	LL n=read(),zi=0,mu=1;
	for(LL i=1;i<=n;i++){
		LL a=read(),b=read(),op=read();
		if(op==1){
			LL tmp=b;
			a*=mu,b*=mu;
			zi*=tmp,mu*=tmp;
			zi+=a;
			if(zi%mu==0)
				if(zi>mu){
					zi/=mu;
					mu=1;
				}
		}
		if(op==2){
			LL tmp=b;
			a*=mu,b*=mu;
			zi*=tmp,mu*=tmp;
			zi-=a;
			if(zi%mu==0)
				if(zi>mu){
					zi/=mu;
					mu=1;
				}
		}
	}
	LL g=gcd(zi,mu);
	zi/=g,mu/=g;
	if(mu==1) printf("%lld",zi);
	else if(mu>0)printf("%lld/%lld",zi,mu);
	else printf("%lld/%lld",-zi,-mu);
//	fclose(stdin);fclose(stdout);
	return 0;
}

样例全过，提交RE了7个点