結果
| 問題 | No.1800 Random XOR |
| ユーザー |
 noya2
|
| 提出日時 | 2022-01-07 21:50:20 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 2 ms / 2,000 ms |
| コード長 | 11,602 bytes |
| コンパイル時間 | 4,334 ms |
| コンパイル使用メモリ | 272,212 KB |
| 最終ジャッジ日時 | 2025-01-27 09:21:57 |
|
ジャッジサーバーID （参考情報） |
judge2 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 14 |
コンパイルメッセージ
main.cpp: In member function ‘std::vector<int> Graph::dfs(int)’:
main.cpp:156:5: warning: no return statement in function returning non-void [-Wreturn-type]
156 | }
| ^
ソースコード
#include <bits/stdc++.h>/*#include <boost/multiprecision/cpp_dec_float.hpp>#include <boost/multiprecision/cpp_int.hpp>namespace mp = boost::multiprecision;using bint = mp::cpp_int;*/#include <atcoder/all>#include <iostream>#include <queue>#include <stack>#include <vector>#include <string>#include <set>#include <map>#include <random>#include <bitset>#define rep(i,n) for (int i = 0; i < int(n); ++i)#define repp(i,n,m) for (int i = m; i < int(n); ++i)#define repb(i,n) for (int i = int(n)-1; i >= 0; --i)#define fi first#define se second#define endl "\n"using namespace std;using namespace atcoder;using ll = long long;using ld = long double;using P = pair<int, int>;using PL = pair<long long, long long>;using Pxy = pair<long double, long double>;using pil = pair<int,ll>;using pli = pair<ll,int>;const int INF = 1001001007;const long long mod1 = 1000000007LL;const long long mod2 = 998244353LL;const ll inf = 2e18;const ld pi = 3.14159265358979323;const ld eps = 1e-7;const char _ = ' ';template<class T>istream &operator>>(istream &is,vector<T> &v){for(auto &e:v)is>>e;return is;}template<class T>ostream &operator<<(ostream &os,const vector<T> &v){if(v.size()!=0){rep(i,v.size())os<<v[i]<<(i+1==v.size()?"":" ");}return os;}template<class T>istream &operator>>(istream &is,vector<vector<T>> &v){for(auto &e:v)is>>e;return is;}template<class T>ostream &operator<<(ostream &os,const vector<vector<T>> &v){if(v.size()!=0){for(auto &e:v)os<<e;}return os;}template<typename T>bool range(T a,T b,T x){return (a<=x&&x<b);}template<typename T>bool rrange(T a,T b,T c,T d,T x,T y){return (range(a,c,x)&&range(b,d,y));}template<typename T>void rev(vector<T> &v){reverse(v.begin(),v.end());}void revs(string &s) {reverse(s.begin(),s.end());}template<typename T>void sor(vector<T> &v, int f=0){sort(v.begin(),v.end());if(f!=0) rev(v);}template<typename T>bool chmin(T &a,const T &b){if(a>b){a=b;return true;}return false;}template<typename T>bool chmax(T &a,const T &b){if(a<b){a=b;return true;}return false;}template<typename T>void eru(vector<T> &v){sor(v);v.erase(unique(v.begin(),v.end()),v.end());}template<typename T>T cel(T a,T b){if(a%b==0)return a/b;return a/b +1;}void o(){cout<<"!?"<<endl;}template<typename T>void o(T a){cout<<a<<endl;}template<typename T,typename U>void o2(T a,U b){cout<<a<<_<<b<<endl;}template<typename T,typename U>void o2(pair<T,U> a){o2(a.first,a.second);}template<typename T,typename U,typename V>void o3(T a,U b,V c){cout<<a<<_<<b<<_<<c<<endl;}template<typename T>void mout(T a){cout<<a.val()<<endl;}void yes(){cout << "Yes" << endl;}void no (){cout << "No" << endl;}void yn (bool t){if(t)yes();else no();}template<typename T>void dame(bool t, T s){if(!t){cout << s << endl;exit(0);}}void fast_io(){cin.tie(0); ios::sync_with_stdio(0); cout<<fixed<<setprecision(20);}vector<int> dx = {0,1,0,-1};vector<int> dy = {1,0,-1,0};const string ALP = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";const string alp = "abcdefghijklmnopqrstuvwxyz";const string num = "0123456789";ll gcd(ll a,ll b){return b?gcd(b,a%b):a;}ll mpow(ll x,ll n,ll m){if(n==0)return 1LL;x%=m;ll a=mpow(x,n/2,m);a=a*a%m;return (n&1)?a*x%m:a;}ll tentou(vector<ll> ar){int n = ar.size();set<ll> st;rep(i,n) st.insert(ar[i]);map<ll,int> mp;int ind = 0;for (ll x : st){mp[x] = ind;ind++;}fenwick_tree<ll> fw(ind);ll ans = 0;rep(i,n){int a = mp[ar[i]];ans += i - fw.sum(0,a+1);fw.add(a,1);}return ans;}struct edge{int from, to, idx;long long cost;edge(int _from = -1, int _to = -1, long long _cost = 1LL, int _idx = -1) : from(_from), to(_to), cost(_cost), idx(_idx) {}};struct vertex{vector<edge> adj;};struct Graph{int n, m;vector<vertex> ar;void add_edge(int from, int to, long long cost = 1LL){assert(0 <= from && from < n);assert(0 <= to && to < n);ar[from].adj.emplace_back(edge(from,to,cost));}void add_dual_edge(int from, int to, long long cost = 1LL){assert(0 <= from && from < n);assert(0 <= to && to < n);ar[from].adj.emplace_back(edge(from,to,cost));ar[to].adj.emplace_back(edge(to,from,cost));}Graph(int _n) : n(_n) , ar(n) {}vector<long long> dijkstra(int s){using pli = pair<long long, int>;priority_queue<pli, vector<pli>, greater<pli>> pque;vector<long long> dist(n,inf);dist[s] = 0LL;pque.push(pli(0,s));while (!pque.empty()){pli p = pque.top(); pque.pop();if (dist[p.second] < p.first) continue;for (edge x : ar[p.second].adj){if (dist[x.to] > p.first + x.cost){dist[x.to] = p.first + x.cost;pque.push(pli(dist[x.to],x.to));}}}return dist;}vector<long long> bfs01(int s){deque<int> que;vector<long long> dist(n,inf);dist[s] = 0LL;que.push_front(s);while (!que.empty()){int p = que.front(); que.pop_front();for (edge x : ar[p].adj){if (dist[x.to] > dist[p] + x.cost){if (x.cost == 0LL) que.push_front(x.to);else que.push_back(x.to);}}}return dist;}vector<int> dfs(int s){vector<int> ans;vector<int> vis(n,0);_dfs(s,ans,vis);}private:void _dfs(int s, vector<int> &ans, vector<int> &vis){vis[s]++;for (edge x : ar[s].adj){if (vis[x.to] == 0){_dfs(x.to,ans,vis);}}ans.emplace_back(s);}};struct Tree{Tree(int _n, int _root = 0) : n(_n), root(_root) {assert(0 <= root && root < n);initialize();}void add_edge(int from, int to, long long cost = 1LL, int _idx = -1){assert(0 <= from && from < n);assert(0 <= to && to < n);if (_idx == -1) _idx = m, m++;assert(0 <= _idx && _idx < n-1);assert(edge_idx_cnt[_idx] == 0);edge_idx_cnt[_idx]++;vs[from].adj.emplace_back(edge(from,to,cost,_idx));es[_idx] = edge(from,to,cost,_idx);}void add_dual_edge(int from, int to, long long cost = 1LL, int _idx = -1){assert(0 <= from && from < n);assert(0 <= to && to < n);if (_idx == -1) _idx = m, m++;assert(0 <= _idx && _idx < n-1);assert(edge_idx_cnt[_idx] == 0);edge_idx_cnt[_idx]++;vs[from].adj.emplace_back(edge(from,to,cost,_idx));vs[to].adj.emplace_back(edge(to,from,cost,_idx));es[_idx] = edge(from,to,cost,_idx);}int size(){return n;}int parent(int v){assert(0 <= v && v < n);if (is_done_par_rdist_init == false) par_rdist_init();return par[v];}int depth(int v){assert(0 <= v && v < n);if (dep[v] != -1) return dep[v];if (v == root) return dep[v] = 0;return dep[v] = depth(parent(v)) + 1;}int subtree_size(int v){assert(0 <= v && v < n);if (sub[v] != 0) return sub[v];sub[v] = 1;for (edge x : vs[v].adj){if (x.to != parent(v)) sub[v] += subtree_size(x.to);}return sub[v];}int lca(int u, int v){assert(0 <= u && u < n);assert(0 <= v && v < n);if (is_done_lca_init == false) lca_init();if (depth(u) > depth(v)) swap(u,v);for (int i = 0; i < 30; i++) if ((depth(v) - depth(u)) >> i & 1) v = par2[i][v];if (u == v) return u;for (int k = 29; k >= 0; k--){if (par2[k][u] != par2[k][v]) {u = par2[k][u];v = par2[k][v];}}return par2[0][u];}long long dist(int u, int v){assert(0 <= u && u < n);assert(0 <= v && v < n);if (is_done_par_rdist_init == false) par_rdist_init();return rdist[u] + rdist[v] - rdist[lca(u,v)] * 2LL;}vector<int> path(int f, int t){assert(0 <= f && f < n);assert(0 <= t && t < n);int v = lca(f,t);vector<int> fp = {f};vector<int> tp = {t};int fn = f, tn = t;while (fn != v){fn = parent(fn);fp.emplace_back(fn);}while (tn != v){tn = parent(tn);tp.emplace_back(tn);}for (int i = int(tp.size()) - 2; i >= 0; i--){fp.emplace_back(tp[i]);}return fp;}vector<long long> alldists(int v){assert(0 <= v && v < n);if (v == 0) return rdist;vector<long long> dists(n,1e18);vector<int> vis(n,0);dists[v] = 0LL;queue<int> que;que.push(v);while (!que.empty()){int p = que.front(); que.pop();vis[p]++;for (edge x : vs[p].adj){if (vis[x.to] == 0){dists[x.to] = dists[p] + x.cost;que.push(x.to);}}}return dists;}vector<int> dfs(int v){assert(0 <= v && v < n);vector<int> ans;vector<int> vis(n,0);_dfs(v,vis,ans);return ans;}edge to_parent(int v){assert(0 <= v && v < n && v != root);if (is_done_par_rdist_init == false) par_rdist_init();return es[epar[v]];}private:int n;int m;int root;int idx_vhfs;bool is_done_lca_init;bool is_done_par_rdist_init;vector<vertex> vs;vector<edge> es;vector<int> edge_idx_cnt;vector<int> par;vector<int> epar;vector<int> dep;vector<int> sub;vector<int> top;vector<long long> rdist;vector<vector<int>> par2;void initialize(){m = 0;is_done_lca_init = false;is_done_par_rdist_init = false;vs.resize(n);es.resize(n-1);edge_idx_cnt.resize(n-1,0);dep.resize(n,-1);sub.resize(n,0);}void lca_init(){par2.resize(30,vector<int>(n,-1));for (int i = 0; i < n; i++) par2[0][i] = parent(i);for (int i = 0; i < 29 ; i++) {for (int j = 0; j < n; j++) {if (par2[i][j] < 0) par2[i+1][j] = -1;else par2[i+1][j] = par2[i][par2[i][j]];}}is_done_lca_init = true;}void par_rdist_init(){par.resize(n,-2);epar.resize(n);rdist.resize(n,-1);par[root] = -1;rdist[root] = 0;queue<int> que;que.push(root);while (!que.empty()){int p = que.front(); que.pop();for (edge x : vs[p].adj){if (par[x.to] == -2){par[x.to] = p;epar[x.to] = x.idx;rdist[x.to] = rdist[p] + x.cost;que.push(x.to);}}}is_done_par_rdist_init = true;}void _dfs(int v, vector<int> &vis, vector<int> &ans){vis[v]++;for (edge x : vs[v].adj){if (vis[x.to] == 0) _dfs(x.to,vis,ans);}ans.emplace_back(v);}};int main(){ll n, m; cin >> n >> m;using mint = modint1000000007;mint ans = mint(2).pow(m);ans -= 1;ans /= 2;mout(ans);}