結果
| 問題 | No.1800 Random XOR |
| コンテスト | |
| ユーザー |
 ryoku
|
| 提出日時 | 2026-07-18 07:38:50 |
| 言語 | C++23(gcc16) (gcc 16.1.0 + boost 1.90.0) |
| 結果 |
AC
|
| 実行時間 | 1 ms / 2,000 ms |
| + 479µs | |
| コード長 | 20,148 bytes |
| 記録 | |
| コンパイル時間 | 2,334 ms |
| コンパイル使用メモリ | 303,388 KB |
| 実行使用メモリ | 5,888 KB |
| 最終ジャッジ日時 | 2026-07-18 07:39:16 |
| 合計ジャッジ時間 | 4,151 ms |
|
ジャッジサーバーID （参考情報） |
judge3_0 / judge1_0 |
（要ログイン）
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 14 |
ソースコード
#line 1 "lib/template.hpp"
#ifdef TEMPLATE
#else
#define TEMPLATE
# pragma GCC optimize("O3")
using namespace std;
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <string>
#include <cstring>
#include <vector>
#include <list>
#include <queue>
#include <stack>
#include <deque>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <algorithm>
#include <numeric>
#include <cmath>
#include <climits>
#include <cassert>
#include <functional>
#include <iterator>
#include <utility>
#include <complex>
#include <bitset>
#include <chrono>
#include <random>
#include <limits>
#include <optional>
#include <variant>
#include <any>
#include <array>
#include <bit>
#include <compare>
#include <concepts>
#include <numbers>
#include <ranges>
#include <span>
#include <string_view>
#include <tuple>
#include <type_traits>
#include <version>
using uint=unsigned;
using ll=long long;
using ull=unsigned long long;
using ld=long double;
using pii=pair<int,int>;
using pll=pair<ll,ll>;
using i128=__int128;
template<class T>using vc=vector<T>;
template<class T>using vvc=vc<vc<T>>;
template<class T>using vvvc=vvc<vc<T>>;
template<class T>using smpq=priority_queue<T,vector<T>,greater<T>>;
template<class T>using bipq=priority_queue<T>;
#define rep(i,n) for(ll i=0;i<(ll)(n);i++)
#define REP(i,j,n) for(ll i=(j);i<(ll)(n);i++)
#define DREP(i,n,m) for(ll i=(n);i>=(m);i--)
#define drep(i,n) for(ll i=((n)-1);i>=0;i--)
#define rall(x) x.rbegin(),x.rend()
#define mp make_pair
#define pb push_back
#define fi first
#define se second
#define is insert
#define bg begin()
#define ed end()
#define all(x) x.begin(),x.end()
void scan(int&a) { cin >> a; }
void scan(ll&a) { cin >> a; }
void scan(string&a) { cin >> a; }
void scan(char&a) { cin >> a; }
void scan(uint&a) { cin >> a; }
void scan(ull&a) { cin >> a; }
void scan(bool&a) { cin >> a; }
void scan(ld&a){ cin>> a;}
template<class T> void scan(vector<T>&a) { for(auto&x:a) scan(x); }
void read() {}
template<class Head, class... Tail> void read(Head&head, Tail&... tail) { scan(head); read(tail...); }
#define INT(...) int __VA_ARGS__; read(__VA_ARGS__);
#define LL(...) ll __VA_ARGS__; read(__VA_ARGS__);
#define ULL(...) ull __VA_ARGS__; read(__VA_ARGS__);
#define STR(...) string __VA_ARGS__; read(__VA_ARGS__);
#define VC(type, name, ...) vector<type> name(__VA_ARGS__); read(name);
#define VVC(type, name, size, ...) vector<vector<type>> name(size, vector<type>(__VA_ARGS__)); read(name);
template<class T>void print(T a) { cout << a; }
template<class T> void print(vector<T>a) { for(int i=0;i<(int)a.size();i++){if(i)cout<<" ";print(a[i]);}cout<<endl;}
void PRT() { cout <<endl; return ; }
template<class T> void PRT(T a) { print(a); cout <<endl; return; }
template<class Head, class... Tail> void PRT(Head head, Tail ... tail) { print(head); cout << " "; PRT(tail...); return; }
template<class T,class F>
bool chmin(T &x, F y){
if(x>y){
x=y;
return true;
}
return false;
}
template<class T, class F>
bool chmax(T &x, F y){
if(x<y){
x=y;
return true;
}
return false;
}
template <typename T>
T floor(T a, T b) {
return a / b - (a % b && (a ^ b) < 0);
}
template <typename T>
T ceil(T x, T y) {
return floor(x + y - 1, y);
}
template <typename T>
T bmod(T x, T y) {
return x - y * floor(x, y);
}
template <typename T>
pair<T, T> divmod(T x, T y) {
T q = floor(x, y);
return {q, x - q * y};
}
void YesNo(bool b){
cout<<(b?"Yes":"No")<<endl;
}
void YESNO(bool b){
cout<<(b?"YES":"NO")<<endl;
}
void AliceBob(bool b){
cout<<(b?"Alice":"Bob")<<endl;
}
void TakahashiAoki(bool b){
cout<<(b?"Takahashi":"Aoki")<<endl;
}
void Yes(){
cout<<"Yes"<<endl;
}
void No(){
cout<<"No"<<endl;
}
vc<int>stovi(const string&s,const string&S){
vc<int>v(s.size());
rep(i,s.size()){
auto t=S.find(s[i]);
assert(t!=string::npos);
v[i]=t;
}
return v;
}
template<class T=ll>
T isqrt(T x){
T F=sqrtl(x);
while((F+1)*(F+1)<=x)F++;
while(F*F>x)F--;
return F;
}
template<class T>
vvc<T>trans(const vvc<T>&a){
assert(a.size()&&a[0].size());
vvc<T>b(a[0].size(),vc<T>(a.size()));
rep(i,a.size())rep(j,a[0].size()){
b[j][i]=a[i][j];
}
return b;
}
template<class T>
vc<string>trans(const vc<string>&a){
assert(a.size()&&a[0].size());
vc<string>b(a[0].size(),string(a.size(),0));
rep(i,a.size())rep(j,a[0].size()){
b[j][i]=a[i][j];
}
return b;
}
template<class T>
int popcount(T n){
return __builtin_popcountll(n);
}
template<class T,class L=ll>
L sum(vc<T>&a){
return accumulate(all(a),L(0));
}
template<class T>
vc<T>subset(T S){
vc<T>ans;
for(T x=S;x>0;x=(x-1)&S)ans.pb(x);
ans.pb(0);
return ans;
}
template<class T>
T max(vc<T>&a){
return *max_element(all(a));
}
template<class T>
T min(vc<T>&a){
return *min_element(all(a));
}
#ifndef COMPRESSER_STRUCT
#define COMPRESSER_STRUCT
template<class T>
struct Compresser{
vc<T>x;
Compresser(int n=0){x.reserve(n);}
Compresser(const vc<T>&xs){
x=xs;
}
void push(T p){built=false;x.pb(p);}
bool built=false;
void build(){
if(!chmax(built,1))return;
sort(all(x));
x.erase(unique(all(x)),x.end());
}
int find(T v){
build();
auto itr=lower_bound(all(x),v)-x.begin();
if(itr==x.size()||x[itr]!=v)return -1;
return itr;
}
int find_next(T v){
build();
return lower_bound(all(x),v)-x.begin();
}
int size(){
build();
return x.size();
}
T operator[](int i)const{
assert(0<=i&&i<x.size());
return x[i];
}
};
#endif
template<class T,class L=ll>
vc<L> presum(vc<T> &a){
vc<L> ret(a.size()+1);
rep(i,a.size())ret[i+1]=ret[i]+a[i];
return ret;
}
template<class T, class F>
vc<T> &operator+=(vc<T> &a,F b){
for (auto&v:a)v += b;
return a;
}
template<class T, class F>
vc<T> &operator-=(vc<T>&a,F b){
for (auto&v:a)v-=b;
return a;
}
template<class T, class F>
vc<T> &operator*=(vc<T>&a,F b){
for (auto&v:a)v*=b;
return a;
}
template<class T=ll>
constexpr T POW(T a,T b){
T res=1;
while(b){
if(b&1)res*=a;
a*=a;
b/=2;
}
return res;
}
constexpr ll ten(ll a){
return POW<ll>(10,a);
}
template<typename T>constexpr T inf=numeric_limits<T>::max()/2-1;
template<class T>
int tbit(T x){
using U=make_unsigned_t<T>;
U y=(U)x;
return y?(int)bit_width(y)-1:-1;
}
template<class T>
int lbit(T x){
using U=make_unsigned_t<T>;
U y=(U)x;
return y?(int)countr_zero(y):-1;
}
template<class T>
int tbit(T x,int p){
using U=make_unsigned_t<T>;
constexpr int W=numeric_limits<U>::digits;
U y=(U)x;
if(p<0)return -1;
if(p>=W-1)return tbit(y);
return tbit(y&((U(1)<<(p+1))-1));
}
template<class T>
int lbit(T x,int p){
using U=make_unsigned_t<T>;
constexpr int W=numeric_limits<U>::digits;
U y=(U)x;
if(p<0)return lbit(y);
if(p>=W)return -1;
return lbit(y&(~U(0)<<p));
}
istream& operator>>(istream&is,i128&x){
string s;is>>s;
x=0;
int i=0,neg=0;
if(s[0]=='-')neg=1,i=1;
for(;i<(int)s.size();i++)x=x*10+s[i]-'0';
if(neg)x=-x;
return is;
}
ostream& operator<<(ostream&os,i128 x){
if(x==0)return os<<0;
if(x<0)os<<"-";
using u128=__uint128_t;
u128 y=x<0?-(u128)x:(u128)x;
string s;
while(y)s.pb('0'+y%10),y/=10;
reverse(all(s));
return os<<s;
}
#define dbg(...) 1111
#ifdef LOCAL
#undef dbg
template<class T,class U>
ostream& operator<<(ostream&os,const pair<T,U>&p){
return os<<"("<<p.fi<<", "<<p.se<<")";
}
template<class T,size_t N>
ostream& operator<<(ostream&os,const array<T,N>&a){
os<<"[";
rep(i,N){
if(i)os<<", ";
os<<a[i];
}
return os<<"]";
}
template<class T>
ostream& operator<<(ostream&os,const vc<T>&a){
os<<"[";
rep(i,a.size()){
if(i)os<<", ";
os<<a[i];
}
return os<<"]";
}
template<class T>
ostream& operator<<(ostream&os,const deque<T>&a){
os<<"[";
rep(i,a.size()){
if(i)os<<", ";
os<<a[i];
}
return os<<"]";
}
template<class T>
ostream& operator<<(ostream&os,const set<T>&s){
os<<"{";
bool f=0;
for(auto&x:s){
if(f)os<<", ";
f=1;
os<<x;
}
return os<<"}";
}
template<class T>
ostream& operator<<(ostream&os,const multiset<T>&s){
os<<"{";
bool f=0;
for(auto&x:s){
if(f)os<<", ";
f=1;
os<<x;
}
return os<<"}";
}
template<class T>
ostream& operator<<(ostream&os,const unordered_set<T>&s){
os<<"{";
bool f=0;
for(auto&x:s){
if(f)os<<", ";
f=1;
os<<x;
}
return os<<"}";
}
template<class T,class U>
ostream& operator<<(ostream&os,const map<T,U>&m){
os<<"{";
bool f=0;
for(auto&x:m){
if(f)os<<", ";
f=1;
os<<x;
}
return os<<"}";
}
template<class T,class U>
ostream& operator<<(ostream&os,const unordered_map<T,U>&m){
os<<"{";
bool f=0;
for(auto&x:m){
if(f)os<<", ";
f=1;
os<<x;
}
return os<<"}";
}
template<class T>
ostream& operator<<(ostream&os,queue<T>q){
vc<T>a;
while(q.size())a.pb(q.front()),q.pop();
return os<<a;
}
template<class T>
ostream& operator<<(ostream&os,stack<T>s){
vc<T>a;
while(s.size())a.pb(s.top()),s.pop();
return os<<a;
}
template<class T,class C,class F>
ostream& operator<<(ostream&os,priority_queue<T,C,F>q){
vc<T>a;
while(q.size())a.pb(q.top()),q.pop();
return os<<a;
}
void debug_out(){cout<<endl;}
template<class T,class... Ts>
void debug_out(const T&x,const Ts&...xs){
cout<<x;
if constexpr(sizeof...(xs))cout<<" ",debug_out(xs...);
else cout<<endl;
}
#define dbg(...) cout<<"["<<#__VA_ARGS__<<"] = ",debug_out(__VA_ARGS__)
#endif
struct TemplateSetup{
TemplateSetup(){
#ifdef LOCAL
freopen("input.txt","r",stdin);
freopen("output.txt","w",stdout);
#endif
cin.tie(0)->sync_with_stdio(0);
#ifdef LOCAL
cout<<fixed<<setprecision(6);
dbg("==============="s);
#else
cout<<fixed<<setprecision(20);
#endif
}
};
inline TemplateSetup template_setup;
#endif
#line 2 "lib/math/barrett.hpp"
struct Barrett{
using u64=uint64_t;
using u32=uint32_t;
using i128=__int128_t;
u64 m;
int mod;
void set(int mod_){
assert(mod_>0);
mod=mod_;
m=(i128(1)<<64)/mod;
}
unsigned reduce(uint64_t x){
assert(mod>0);
x-=(((i128)x*m)>>64)*mod;
return x<mod?x:x-mod;
}
};
#line 3 "lib/math/dynamic-mod-int.hpp"
template<int id>
struct DynamicModInt{
using u32=uint32_t;
using u64=uint64_t;
u32 val;
DynamicModInt():val(0){}
DynamicModInt(ll x){
ll v=x%get_mod();
if(v<0)v+=get_mod();
val=v;
}
static DynamicModInt raw(int v){
assert(v>=0);
DynamicModInt mi;
mi.val=v;
return mi;
}
DynamicModInt &operator+=(const DynamicModInt&m){
if((val+=m.val)>=get_mod())val-=get_mod();
return *this;
}
DynamicModInt &operator-=(const DynamicModInt&m){
if((val+=(get_mod()-m.val))>=get_mod())val-=get_mod();
return *this;
}
DynamicModInt &operator*=(const DynamicModInt&m){
val=rem(u64(val)*m.val);
return *this;
}
DynamicModInt &operator/=(const DynamicModInt&m){
val=rem(u64(val)*m.inv().val);
return *this;
}
DynamicModInt operator-() const{
return DynamicModInt(val?get_mod()-val:0);
}
DynamicModInt operator+() const {
return *this;
}
friend DynamicModInt operator+(DynamicModInt lhs, const DynamicModInt& rhs){
return lhs+=rhs;
}
friend DynamicModInt operator-(DynamicModInt lhs, const DynamicModInt& rhs){
return lhs-=rhs;
}
friend DynamicModInt operator*(DynamicModInt lhs, const DynamicModInt& rhs){
return lhs*=rhs;
}
friend DynamicModInt operator/(DynamicModInt lhs,const DynamicModInt&rhs){
return lhs/=rhs;
}
bool operator==(const DynamicModInt&p) const{
return p.val==val;
}
bool operator!=(const DynamicModInt&p) const{
return p.val!=val;
}
DynamicModInt pow(int64_t n) const{
DynamicModInt res(1),mul(val);
while(n){
if(n%2)res*=mul;
mul*=mul;
n/=2;
}
return res;
}
friend ostream&operator<<(ostream&os,const DynamicModInt&p){
os<<p.val;
return os;
}
friend istream&operator>>(istream&is,DynamicModInt&p){
int64_t x;
is>>x;
p=DynamicModInt(x);
return is;
}
DynamicModInt inv()const{
int64_t a=val,b=get_mod(),u=1,v=0,t;
#ifdef LOCAL
assert(gcd(a,b)==1);
#endif
while(b>0){
t=a/b;
swap(a-=t*b,b);
swap(u-=t*v,v);
}
return DynamicModInt(u);
}
inline static u32 rem(u64 x){return BarrettReduction().reduce(x);}
static inline int &get_mod(){
static int mod=0;
return mod;
}
static void set_mod(int md){
assert(0<md&&md<=(1ll<<31)-1);
get_mod()=md;
BarrettReduction().set(md);
}
static inline Barrett&BarrettReduction(){
static Barrett b;
return b;
}
};
#line 3 "lib/math/mod.hpp"
template<class,class=void>
struct BinomHasGetMod:false_type{};
template<class mint>
struct BinomHasGetMod<mint,void_t<decltype(mint::get_mod())>>:true_type{};
template<class mint>
struct Binom{
private:
static vector<mint>&fact_table(){static vector<mint>v={1};return v;}
static vector<mint>&invfact_table(){static vector<mint>v={1};return v;}
static vector<mint>&invs_table(){static vector<mint>v={0};return v;}
static int&built_mod(){static int mod=-1;return mod;}
public:
static void build(int n){
auto&_fact=fact_table();
auto&_invfact=invfact_table();
auto&_invs=invs_table();
if constexpr(BinomHasGetMod<mint>::value){
auto mod=mint::get_mod();
if(built_mod()!=mod){
_fact={1};
_invfact={1};
_invs={0};
built_mod()=mod;
}
}
if(n<(int)_fact.size())return;
int old=_fact.size();
_fact.resize(n+1);
_invfact.resize(n+1);
_invs.resize(n+1);
if constexpr(BinomHasGetMod<mint>::value){
auto mod=mint::get_mod();
for(int i=old;i<=n;i++){
_fact[i]=_fact[i-1]*i;
if(i==1)_invs[i]=1;
else _invs[i]=-_invs[mod%i]*(mod/i);
_invfact[i]=_invfact[i-1]*_invs[i];
}
}else{
for(int i=old;i<=n;i++){
_fact[i]=_fact[i-1]*i;
_invs[i]=mint(1)/i;
_invfact[i]=_invfact[i-1]*_invs[i];
}
}
}
static mint fact(int i){
assert(i>=0);
build(i);
return fact_table()[i];
}
static mint invfact(int i){
assert(i>=0);
build(i);
return invfact_table()[i];
}
static mint inv(int i){
assert(i>0);
build(i);
return invs_table()[i];
}
static mint C(int a,int b){//aCb
if(a<0||b<0||a-b<0)return mint(0);
build(a);
auto&_fact=fact_table();
auto&_invfact=invfact_table();
return _fact[a]*_invfact[b]*_invfact[a-b];
}
static mint iC(int a,int b){//1/aCb
if(a<0||b<0||a-b<0)return mint(0);
build(a);
auto&_fact=fact_table();
auto&_invfact=invfact_table();
return _fact[b]*_fact[a-b]*_invfact[a];
}
static mint P(int a,int b){
if(a<b||b<0)return 0;
build(a);
auto&_fact=fact_table();
auto&_invfact=invfact_table();
return _fact[a]*_invfact[a-b];
}
static mint H(int a,int b){
return C(a+b-1,b);
}
};
template< typename T >
T extgcd(T a, T b, T &x, T &y) {
T d = a;
if(b != 0) {
d = extgcd(b, a % b, y, x);
y -= (a / b) * x;
} else {
x = 1;
y = 0;
}
return d;
}
template<class T>
pair<T,T> inv(T x,T m){
T a1,a2;
T res=extgcd<ll>(x,m,a1,a2);
T md=m/res;
a1=(a1%md+md)%md;
return {a1,md};
}
template<class T>
pair<T,T> mod_solve(T a,T b,T m){//return x s.t. ax=b mod m
a%=m,b%=m;if(a<0)a+=m;if(b<0)b+=m;
T g=gcd(gcd(a,b),m);
a/=g,b/=g,m/=g;
if(gcd(a,m)>1)return {-1,-1};
return {(inv<ll>(a,m).first*b)%m,inv<ll>(a,m).second};
}
//https://nyaannyaan.github.io/library/modulo/mod-sqrt.hpp.html
int64_t mod_sqrt(const int64_t &a, const int64_t &p) {
assert(0 <= a && a < p);
if (a < 2) return a;
using Mint = DynamicModInt<409075245>;
Mint::set_mod(p);
if (Mint(a).pow((p - 1) >> 1) != 1) return -1;
Mint b = 1, one = 1;
while (b.pow((p - 1) >> 1) == 1) b += one;
int64_t m = p - 1, e = 0;
while (m % 2 == 0) m >>= 1, e += 1;
Mint x = Mint(a).pow((m - 1) >> 1);
Mint y = Mint(a) * x * x;
x *= a;
Mint z = Mint(b).pow(m);
while (y != 1) {
int64_t j = 0;
Mint t = y;
while (t != one) {
j += 1;
t *= t;
}
z = z.pow(int64_t(1) << (e - j - 1));
x *= z;
z *= z;
y *= z;
e = j;
}
return x.val;
}
#line 3 "lib/math/static-mod-int.hpp"
template<uint32_t mod>
struct StaticModInt{
static_assert(0<mod&&mod<=(1u<<31)-1);
using u32=uint32_t;
using u64=uint64_t;
u32 val;
StaticModInt():val(0){}
StaticModInt(ll x){
ll v=x%mod;
if(v<0)v+=mod;
val=v;
}
constexpr static uint32_t get_mod(){
return mod;
}
static StaticModInt raw(int v){
assert(v>=0);
StaticModInt mi;
mi.val=v;
return mi;
}
StaticModInt &operator+=(const StaticModInt&m){
if((val+=m.val)>=mod)val-=mod;
return *this;
}
StaticModInt &operator-=(const StaticModInt&m){
if((val+=(mod-m.val))>=mod)val-=mod;
return *this;
}
StaticModInt &operator*=(const StaticModInt&m){
val=u64(val)*m.val%mod;
return *this;
}
StaticModInt &operator/=(const StaticModInt&m){
val=u64(val)*m.inv().val%mod;
return *this;
}
StaticModInt operator-() const{
return StaticModInt(mod-val);
}
StaticModInt operator+() const {
return *this;
}
friend StaticModInt operator+(StaticModInt lhs, const StaticModInt& rhs){
return lhs+=rhs;
}
friend StaticModInt operator-(StaticModInt lhs, const StaticModInt& rhs){
return lhs-=rhs;
}
friend StaticModInt operator*(StaticModInt lhs, const StaticModInt& rhs){
return lhs*=rhs;
}
friend StaticModInt operator/(StaticModInt lhs,const StaticModInt&rhs){
return lhs/=rhs;
}
bool operator==(const StaticModInt&p) const{
return p.val==val;
}
bool operator!=(const StaticModInt&p) const{
return p.val!=val;
}
StaticModInt pow(int64_t n) const{
StaticModInt res(1),mul(val);
while(n){
if(n%2)res*=mul;
mul*=mul;
n/=2;
}
return res;
}
friend ostream&operator<<(ostream&os,const StaticModInt&p){
os<<p.val;
return os;
}
friend istream&operator>>(istream&is,StaticModInt&p){
int64_t x;
is>>x;
p=StaticModInt(x);
return is;
}
StaticModInt inv()const{
int64_t a=val,b=mod,u=1,v=0,t;
#ifdef LOCAL
assert(gcd(a,b)==1);
#endif
while(b>0){
t=a/b;
swap(a-=t*b,b);
swap(u-=t*v,v);
}
return StaticModInt(u);
}
};
#line 3 "a.cpp"
using mint=StaticModInt<(int)1e9+7>;
void solve(){
LL(n,m);
PRT((mint(2).pow(m)-1)/2);
}
signed main(){
int t=1;
// cin >> t;
while(t--)solve();
}