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- #pragma GCC optimize("Ofast")
- #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,fma")
- #pragma GCC optimize("unroll-loops")
- #pragma comment(linker, "/stack:200000000")
- #include<bits/stdc++.h>
- #include<ext/pb_ds/assoc_container.hpp>
- #include<ext/pb_ds/tree_policy.hpp>
- #define int long long
- #define ull unsigned long long
- #define vi vector<int>
- #define vvl vector<vector<int>>
- #define deql deque<int>
- #define prquel priority_queue<int>
- #define loop(i,n) for(int i=0;i<n;i++)
- #define loopn(i,a,b) for(int i=a;i<=b;i++)
- #define rloop(i,n) for(int i=n;i>0;i--)
- #define sortv(a) sort(a.begin(),a.end())
- #define sortvr(a) sort(a.rbegin(),a.rend())
- #define verase(a) a.erase(unique(a.begin(),a.end()),a.end())
- #define all(a) a.begin(),a.end()
- #define getv(v,n) for(int i=0;i<n;i++){int x; cin>>x; v.push_back(x);};
- #define dbg(x) cerr<<#x<<" = "; _print(x);cerr<<"\n";
- #define mp make_pair
- #define pb push_back
- #define pf push_front
- #define fi first
- #define se second
- #define endl "\n"
- #define inf 2e18
- using namespace std;
- using namespace __gnu_pbds;
- int MOD=1000000007;
- int mod=998244353;
- const int N=200050;
- const int nn=1000050;
- int fact[N]; // array to store values of factorial
- bool prime[nn]; //array to store precalculated primes till 10^6
- void _print(int a){cerr<<a;} void _print(char a){cerr<<a;} void _print(bool a){cerr<<a;} void _print(string a){cerr<<a;}
- template<class T> void _print(vector<T> v1){ cerr<<"[ "; for(T i:v1){_print(i);cerr<<" ";}cerr<<"]";}
- template<class T> void _print(set<T> s1){ cerr<<"[ "; for(T i:s1){_print(i);cerr<<" ";}cerr<<"]";}
- template<class T> void _print(map<T,T> m1){for(auto i:m1){cerr<<"[ "; _print(i.first);cerr<<" : ";_print(i.second);cerr<<" ]";cerr<<endl;}}
- typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> indexed_set;
- template<class T> T gcd(T a,T b){if(!a||!b)return a|b; unsigned shift=__builtin_ctz(a|b); a>>=__builtin_ctz(a); do{b>>=__builtin_ctz(b); if(a>b)swap(a,b);b-=a;}while(b); return a<<shift;}
- template<class T> T lcm(T a,T b){ unsigned val=max(a,b)/gcd(a,b);val*=min(a,b);return val;}
- bool pow2(int x){if(x&&(!(x&(x-1)))) return true; else return false;}
- int multiply(int x, int y){return (x * 1ll * y) % MOD;}
- int power(int x, int y){int z = 1;while(y){if(y & 1) z = multiply(z, x);x = multiply(x, x);y >>= 1;}return z;}
- int modInverse(int x){return power(x, MOD - 2);}
- int divide(int x, int y){return multiply(x, modInverse(y));}
- void cal_factorial(){fact[0] = 1;for(int i = 1; i < N; i++)fact[i] = multiply(fact[i - 1], i);}// function to calculate factorial upto N
- void cal_primes(){memset(prime,true,sizeof(prime)); loopn(i,2,sqrt(nn)){ if(prime[i]==true){ for(int j=i*i;j<=nn;j+=i){prime[j]=false;}}}}
- int nCr(int n, int k){return divide(fact[n], multiply(fact[k], fact[n - k]));}
- vector<int>Intersection(vi &v1,vi &v2){vi v3;sort(all(v1));sort(all(v2));set_intersection(all(v1),all(v2),back_inserter(v3));return v3;}
- vector<int>Union(vi &v1,vi&v2){vi v3;sort(all(v1));sort(all(v2));set_union(all(v1),all(v2),back_inserter(v3));return v3;}
- void FASTIO(){ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);}
- int dx[8]={0,1,0,-1,1,1,-1,-1}; //direction vectors
- int dy[8]={1,0,-1,0,1,-1,-1,1}; //direction vectors
- void dfs(int node,vector<vector<int>>& graph,vector<bool>& visited){
- for(auto it:graph[node]){
- if(!visited[it]){
- visited[it]=true;
- dfs(it,graph,visited);
- }
- }
- return;
- }
- void solve(int t)
- {
- int testcases=t;
- while(t--)
- {
- //cout<<"#"<<(testcases-t)<<" Test-Case: "<<endl;
- //cout<<"Case #"<<(testcases-t)<<": ";
- int n;cin>>n;
- vector<vector<int>>v(2,vector<int>(n));
- vector<vector<int>>g(n+1);
- vector<bool>vis(n+1,false);
- for(int i=0;i<2;i++){
- for(int j=0;j<n;j++){
- cin>>v[i][j];
- }
- }
- for(int i=0;i<n;i++){
- g[v[0][i]].pb(v[1][i]);
- g[v[1][i]].pb(v[0][i]);
- }
- int x=0,ans=2;
- for(int i=1;i<=n;i++){
- if(!vis[i]){
- x++;
- dfs(i,g,vis);
- }
- }
- for(int i=1;i<x;i++){
- ans=((ans*2)%MOD);
- }
- cout<<ans<<endl;
- }
- }
- main()
- {
- auto start=chrono::system_clock::now();
- {
- #ifndef ONLINE_JUDGE
- freopen("input.txt","r",stdin);
- freopen("output.txt","w",stdout);
- freopen("error.txt","w",stderr);
- #endif
- FASTIO();
- int t=1;
- cin>>t;
- solve(t);
- }
- auto end=chrono::system_clock::now();
- chrono::duration<double> elapsed=end-start;
- // cout<<" Time taken: "<<elapsed.count()<<" sec";
- return 0;
- }
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