結果
| 問題 | No.1775 Love Triangle 2 |
| コンテスト | |
| ユーザー |
Taiki0715
|
| 提出日時 | 2026-01-30 21:57:25 |
| 言語 | C++23 (gcc 15.2.0 + boost 1.89.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 5,803 bytes |
| 記録 | |
| コンパイル時間 | 6,149 ms |
| コンパイル使用メモリ | 457,248 KB |
| 実行使用メモリ | 7,968 KB |
| 最終ジャッジ日時 | 2026-01-30 21:58:07 |
| 合計ジャッジ時間 | 41,107 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 73 WA * 17 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
using ll=long long;
using ull=unsigned long long;
using P=pair<ll,ll>;
template<typename T>using minque=priority_queue<T,vector<T>,greater<T>>;
template<typename T>bool chmax(T &a,const T &b){return (a<b?(a=b,true):false);}
template<typename T>bool chmin(T &a,const T &b){return (a>b?(a=b,true):false);}
template<typename T1,typename T2>istream &operator>>(istream &is,pair<T1,T2>&p){is>>p.first>>p.second;return is;}
template<typename T1,typename T2,typename T3>istream &operator>>(istream &is,tuple<T1,T2,T3>&a){is>>std::get<0>(a)>>std::get<1>(a)>>std::get<2>(a);return is;}
template<typename T,size_t n>istream &operator>>(istream &is,array<T,n>&a){for(auto&i:a)is>>i;return is;}
template<typename T>istream &operator>>(istream &is,vector<T> &a){for(auto &i:a)is>>i;return is;}
template<typename T1,typename T2>void operator++(pair<T1,T2>&a,int n){a.first++,a.second++;}
template<typename T1,typename T2>void operator--(pair<T1,T2>&a,int n){a.first--,a.second--;}
template<typename T>void operator++(vector<T>&a,int n){for(auto &i:a)i++;}
template<typename T>void operator--(vector<T>&a,int n){for(auto &i:a)i--;}
#define overload3(_1,_2,_3,name,...) name
#define rep1(i,n) for(int i=0;i<(int)(n);i++)
#define rep2(i,l,r) for(int i=(int)(l);i<(int)(r);i++)
#define rep(...) overload3(__VA_ARGS__,rep2,rep1)(__VA_ARGS__)
#define reps(i,l,r) rep2(i,l,r)
#define all(x) x.begin(),x.end()
#define pcnt(x) __builtin_popcountll(x)
#define fin(x) return cout<<(x)<<'\n',static_cast<void>(0)
#define yn(x) cout<<((x)?"Yes\n":"No\n")
#define uniq(x) sort(all(x)),x.erase(unique(all(x)),x.end())
template<typename T>
inline int fkey(vector<T>&z,T key){return lower_bound(z.begin(),z.end(),key)-z.begin();}
ll myceil(ll a,ll b){return (a+b-1)/b;}
template<typename T,size_t n,size_t id=0>
auto vec(const int (&d)[n],const T &init=T()){
if constexpr (id<n)return vector(d[id],vec<T,n,id+1>(d,init));
else return init;
}
#ifdef LOCAL
#include<debug.h>
#define SWITCH(a,b) (a)
#else
#define debug(...) static_cast<void>(0)
#define debugg(...) static_cast<void>(0)
#define SWITCH(a,b) (b)
template<typename T1,typename T2>ostream &operator<<(ostream &os,const pair<T1,T2>&p){os<<p.first<<' '<<p.second;return os;}
#endif
struct Timer{
clock_t start;
Timer(){
start=clock();
ios::sync_with_stdio(false);
cin.tie(nullptr);
cout<<fixed<<setprecision(16);
}
inline double now(){return (double)(clock()-start)/1000;}
#ifdef LOCAL
~Timer(){
cerr<<"time:";
cerr<<now();
cerr<<"ms\n";
}
#endif
}timer;
void SOLVE();
int main(){
int testcase=1;
//cin>>testcase;
for(int i=0;i<testcase;i++){
SOLVE();
}
}
#include<concepts>
#include<immintrin.h>
struct gf2{
private:
unsigned long long v;
static constexpr unsigned long long table[16]={0,27,45,54,90,65,119,108,175,180,130,153,245,238,216,195};
public:
gf2():v(){}
template<std::integral T>
gf2(T x):v(x){}
inline gf2 operator+()const{return *this;}
inline gf2 operator-()const{return *this;}
inline gf2 &operator+=(const gf2&rhs){v^=rhs.v;return *this;}
inline gf2 &operator-=(const gf2&rhs){v^=rhs.v;return *this;}
__attribute__((target("pclmul,sse4.2")))
inline gf2 &operator*=(const gf2&rhs){
__m128i m=_mm_clmulepi64_si128(_mm_set_epi64x(0,v),_mm_set_epi64x(0,rhs.v),0);
unsigned long long high=_mm_extract_epi64(m,1);
unsigned long long low=_mm_extract_epi64(m,0);
v=high^(high<<1);
low^=v^(v<<3);
v=low^table[high>>60];
return *this;
}
inline gf2 &operator/=(const gf2&rhs){return *this*=rhs.inv();}
friend gf2 operator+(const gf2&lhs,const gf2&rhs){return gf2(lhs)+=rhs;}
friend gf2 operator-(const gf2&lhs,const gf2&rhs){return gf2(lhs)-=rhs;}
friend gf2 operator*(const gf2&lhs,const gf2&rhs){return gf2(lhs)*=rhs;}
friend gf2 operator/(const gf2&lhs,const gf2&rhs){return gf2(lhs)/=rhs;}
auto operator<=>(const gf2&)const=default;
gf2 pow(unsigned long long k)const{
gf2 res=1,a=*this;
while(k){
if(k&1)res*=a;
a*=a;
k>>=1;
}
return res;
}
inline gf2 inv()const{return pow(-2);}
unsigned long long val()const{return v;}
friend std::istream &operator>>(std::istream&is,gf2&rhs){is>>rhs.v;return is;}
friend std::ostream &operator<<(std::ostream&os,const gf2&rhs){os<<rhs.v;return os;}
};
#include<type_traits>
namespace Random{
std::mt19937_64 mt(std::random_device{}());
template<typename T>inline std::enable_if_t<std::is_integral_v<T>,T> get(){return mt();}
template<typename T>inline std::enable_if_t<std::is_floating_point_v<T>,T> get(){return T(mt())/T(-1ull);}
template<typename T>inline std::enable_if_t<std::is_integral_v<T>,T>range(T n){return mt()%n;}
template<typename T>inline std::enable_if_t<std::is_integral_v<T>,T>range(T l,T r){return l+mt()%(r-l);}
template<typename T>inline std::enable_if_t<std::is_integral_v<T>,std::pair<T,T>>distinct(T n){
T l=mt()%n,r=mt()%(n-1);
if(l==r)r++;
if(l>r)std::swap(l,r);
return std::make_pair(l,r);
}
}
void SOLVE(){
int n,m;
cin>>n>>m;
int x,y,z;
cin>>x>>y>>z;
x--,y--,z--;
vector<vector<bool>>edge(n,vector<bool>(n));
rep(i,m){
int u,v;
cin>>u>>v;
u--,v--;
edge[u][v]=edge[v][u]=true;
}
vector<vector<gf2>>g(n,vector<gf2>(n));
rep(i,n)rep(j,i+1,n)if(!edge[i][j]){
g[i][j]=g[j][i]=Random::get<ull>();
if(i==x||j==x)g[j][i]=Random::get<ull>();
}
auto dp=vec<gf2>({4,n,n});
dp[0][x][x]=Random::get<ull>();
vector<int>mask(n);
mask[y]=1,mask[z]=2;
rep(len,1,n+1){
auto ndp=vec<gf2>({4,n,n});
rep(i,4)rep(j,n)rep(k,n){
rep(l,n)if(j!=l&&!edge[k][l]){
ndp[i|mask[l]][k][l]+=dp[i][j][k]*g[k][l];
}
}
dp=move(ndp);
rep(i,n)if(dp[3][i][x].val())fin(len);
}
cout<<"-1\n";
}
Taiki0715