1 #include <cstdio>
 2 #include <cstring>
 3 #include <algorithm>
 4 using namespace std;
 5 typedef long long ll;
 6 template<typename T>inline void read(T &x){
 7     x=0;char ch;bool flag = false;
 8     while(ch=getchar(),ch<‘!‘);if(ch == ‘-‘) ch=getchar(),flag = true;
 9     while(x=10*x+ch-‘0‘,ch=getchar(),ch>‘!‘);if(flag) x=-x;
10 }
11 inline int cat_max(const int &a,const int &b){return a>b ? a:b;}
12 inline int cat_min(const int &a,const int &b){return a<b ? a:b;}
13 const int maxn = 500010;
14 ll a[maxn],b[maxn],c[maxn],cnt;
15 #define lowbit(x) (x&-x)
16 int main(){
17     ll n,S=0;read(n);
18     for(int i=1;i<=n;++i){
19         read(a[i]);read(b[i]);
20         S^=a[i];a[i]^=b[i];
21     }
22     for(int i=1;i<=n;++i){
23         for(int j=1;j<=cnt;++j){
24             if(a[i] & lowbit(c[j])) a[i] ^= c[j];
25         }if(a[i] != 0) c[++cnt] = a[i];
26     }
27     for(int i=1;i<=cnt;++i){
28         if(S & lowbit(c[i])) S ^= c[i];
29     }
30     if(S != 0) puts("1/1");
31     else{
32         ll x = 1LL<<cnt;
33         printf("%lld/%lld\n",x-1,x);
34     }
35     getchar();getchar();
36     return 0;
37 }
38