結果
| 問題 |
No.2748 Strange Clock
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2024-04-20 17:02:22 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 4,118 bytes |
| コンパイル時間 | 5,042 ms |
| コンパイル使用メモリ | 260,052 KB |
| 最終ジャッジ日時 | 2025-02-21 06:57:40 |
|
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 33 WA * 4 |
ソースコード
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
#pragma GCC optimize("Ofast,unroll-loops")
#include <bits/stdc++.h>
using namespace std;
#include<atcoder/math>
using namespace atcoder;
using ll = long long int;
using ull = unsigned long long int;
using ld = long double;
constexpr ll MAX = 2000000000000000000;
constexpr ld PI = 3.14159265358979;
constexpr ll MOD = 0;//2024948111;
ld dotorad(ld K){ return PI * K / 180.0; }
ld radtodo(ld K){ return K * 180.0 / PI; }
mt19937 mt;
void randinit(){ srand((unsigned)time(NULL));mt = mt19937(rand()); }
__int128_t modinv(__int128_t A,__int128_t M){
//A*r+B*n=gcd(A,B)
A %= M;
if(A == 0 || __gcd(A,M) != 1){
//cout << "Error modinv(" << A << "," << M << ")" << endl;
return -1;
}
__int128_t B = M,U = 1,V = 0;
while(B){
__int128_t T = A / B;
A -= T * B;
swap(A,B);
U -= T * V;
swap(U,V);
}
U %= M;
if(U < 0) U += M;
return U;
}
int main(){
ll N,M;
cin >> N >> M;
vector<ll> pow3(60,1),pow4(60,1),pow6(60,1),pow2(60,1);
for(ll i = 1;i < 60;i++){
pow2[i] = pow2[i - 1] * 2;
pow3[i] = pow3[i - 1] * 3;
pow4[i] = pow4[i - 1] * 4;
pow6[i] = pow6[i - 1] * 6;
}
ll l = pow2[N * 2] * pow3[N];
if(N >= 13){
__int128_t t1 = (modinv(pow3[N],pow2[N * 2]) * pow3[N]) % l;
__int128_t t2 = (modinv(pow2[N * 2],pow3[N]) * pow2[N * 2]) % l;
ll ID = 0;
vector<ll> memo2(pow3[N - 1],0);
for(ll bb = 0;bb < pow3[N];bb += 3){
ll c = bb;
ll p4 = 0,p6 = 0;
for(ll i = 0;i < N;i++){
ll x = c % 3;
c /= 3;
p4 += x * pow4[i];
p6 += x * pow6[i];
}
ll x = (bb * t2 + p4 * t1) % l;
ll zurasi = p6 - x;
zurasi %= pow6[N];
if(zurasi < 0) zurasi += pow6[N];
memo2[bb / 3] = (zurasi);
}
gp_hash_table<ll,ll> X;
ll ans = 0;
for(ll id = 0;id < pow3[N - 1];id++){
ll bb = 3 * id;
ll z = memo2[id];
if(X.find(z) != X.end()){
ll z1 = X[z];
ll z2 = bb;
if(z2 < z1) swap(z1,z2);
ll d1 = (z2 - (z1 + 3)) % l;
if(d1 >= M) ans++;
ll d2 = (z1 - (z2 + 3)) % l;
if(d2 < 0) d2 += l;
if(d2 >= M) ans++;
X.erase(z);
continue;
}
else{
X[z] = bb;
}
}
for(auto [z,bb] : X){
if(M <= l - 3) ans++;
}
cout << ans << endl;
}
else{
map<ll,vector<ll>> A,B;
vector<ll> Z;
for(ll bb = 0;bb < pow3[N];bb++){
ll c = bb;
ll p3 = 0,p4 = 0,p6 = 0;
for(ll i = 0;i < N;i++){
ll x = c % 3;
c /= 3;
p3 += x * pow3[i];
p4 += x * pow4[i];
p6 += x * pow6[i];
}
tuple<ll,ll> P = crt({p3,p4},{pow3[N],pow4[N]});
ll x = get<0>(P),m = get<1>(P);
ll zurasi = p6 - x;
zurasi %= pow6[N];
if(zurasi < 0) zurasi += pow6[N];
Z.emplace_back(zurasi);
//assert(m == l);
A[zurasi].emplace_back(x);
A[zurasi].emplace_back(x + l);
A[zurasi].emplace_back(x + l + l);
x -= M;
x %= l;
if(x < 0) x += l;
B[zurasi].emplace_back(x);
}
sort(Z.begin(),Z.end());
Z.erase(unique(Z.begin(),Z.end()),Z.end());
ll ans = 0;
for(ll z : Z){
vector<ll> a = A[z],b = B[z];
sort(a.begin(),a.end());
sort(b.begin(),b.end());
for(ll i = 0;i < b.size();i++){
ll x = b[i];
auto it = lower_bound(a.begin(),a.end(),x);
if(*it == x + M) ans++;
}
}
cout << ans << endl;
}
}