結果
| 問題 |
No.1112 冥界の音楽
|
| コンテスト | |
| ユーザー |
suta28407928
|
| 提出日時 | 2020-07-10 22:53:10 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 12 ms / 2,000 ms |
| コード長 | 4,485 bytes |
| コンパイル時間 | 1,141 ms |
| コンパイル使用メモリ | 107,480 KB |
| 実行使用メモリ | 5,248 KB |
| 最終ジャッジ日時 | 2024-11-15 04:53:44 |
| 合計ジャッジ時間 | 2,242 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 34 |
ソースコード
#include <iostream>
#include <string>
#include <cstdlib>
#include <cmath>
#include <vector>
#include <unordered_map>
#include <map>
#include <set>
#include <algorithm>
#include <queue>
#include <stack>
#include <functional>
#include <bitset>
#include <assert.h>
#include <unordered_map>
#include <fstream>
#include <complex>
using namespace std;
typedef long long ll;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<char> vc;
typedef vector<string> vs;
typedef vector<bool> vb;
typedef vector<double> vd;
typedef pair<ll,ll> P;
typedef pair<int,int> pii;
typedef vector<P> vpl;
typedef tuple<ll,ll,ll> tapu;
#define rep(i,n) for(int i=0; i<(n); i++)
#define REP(i,a,b) for(int i=(a); i<(b); i++)
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
const int inf = 1<<30;
const ll linf = 1LL<<62;
const int MAX = 510000;
ll dy[8] = {0,-1,0,1,1,-1,1,-1};
ll dx[8] = {1,0,-1,0,1,-1,-1,1};
const double pi = acos(-1);
const double eps = 1e-7;
template<typename T1,typename T2> inline bool chmin(T1 &a,T2 b){
if(a>b){
a = b; return true;
}
else return false;
}
template<typename T1,typename T2> inline bool chmax(T1 &a,T2 b){
if(a<b){
a = b; return true;
}
else return false;
}
template<typename T> inline void print(T &a){
rep(i,a.size()) cout << a[i] << " ";
cout << "\n";
}
template<typename T1,typename T2> inline void print2(T1 a, T2 b){cout << a << " " << b << "\n";}
template<typename T1,typename T2,typename T3> inline void print3(T1 a, T2 b, T3 c){
cout << a << " " << b << " " << c << "\n";
}
const ll mod = 1e9 + 7;
//const int mod = 998244353;
template <std::uint_fast64_t Modulus> class modint {
using u64 = std::uint_fast64_t;
public:
u64 a;
constexpr modint(const u64 x = 0) noexcept : a(x % Modulus) {}
constexpr u64 &value() noexcept { return a; }
constexpr const u64 &value() const noexcept { return a; }
constexpr modint operator+(const modint rhs) const noexcept {
return modint(*this) += rhs;
}
constexpr modint operator-(const modint rhs) const noexcept {
return modint(*this) -= rhs;
}
constexpr modint operator*(const modint rhs) const noexcept {
return modint(*this) *= rhs;
}
constexpr modint operator/(const modint rhs) const noexcept {
return modint(*this) /= rhs;
}
constexpr modint &operator+=(const modint rhs) noexcept {
a += rhs.a;
if (a >= Modulus) {
a -= Modulus;
}
return *this;
}
constexpr modint &operator-=(const modint rhs) noexcept {
if (a < rhs.a) {
a += Modulus;
}
a -= rhs.a;
return *this;
}
constexpr modint &operator*=(const modint rhs) noexcept {
a = a * rhs.a % Modulus;
return *this;
}
constexpr modint &operator/=(modint rhs) noexcept {
u64 exp = Modulus - 2;
while (exp) {
if (exp % 2) {
*this *= rhs;
}
rhs *= rhs;
exp /= 2;
}
return *this;
}
};
using mint = modint<mod>;
vvl matmul(vvl &a, vvl &b){
vvl c(a.size(), vl(b[0].size()));
for(int i=0; i<a.size(); i++){
for(int k=0; k<b.size(); k++){
for(int j=0; j<b[0].size(); j++){
c[i][j] = (c[i][j] + a[i][k] * b[k][j]) % mod;
}
}
}
return c;
}
vvl matpow(vvl a, ll n){
vvl b(a.size(), vl(a.size()));
for(int i=0; i<a.size(); i++) b[i][i] = 1;
while(n > 0){
if(n & 1) b = matmul(b,a);
a = matmul(a,a);
n >>= 1;
}
return b;
}
ll modpow(ll x, ll n, ll mod){
ll res = 1;
while(n > 0){
if(n & 1) res = res * x % mod;
x = x * x % mod;
n >>= 1;
}
return res;
}
ll a[6][6][6];
int main(){
ll K,m,n; cin >> K >> m >> n;
rep(i,m){
ll p,q,r; cin >> p >> q >> r;
p--; q--; r--;
a[p][q][r] = 1;
}
ll ans = 0;
if(n == 3){
rep(j,K) ans += a[0][j][0];
cout << ans << "\n";
return 0;
}
ll L = K*K;
vvl b(L,vl(L,0));
vl c(L,0);
rep(j,K){
rep(k,K){
c[j*K + k] += a[0][j][k];
}
}
rep(i,K){
rep(j,K){
rep(k,K){
b[j*K+k][i*K+j] += a[i][j][k];
}
}
}
b = matpow(b,n-4);
rep(i,L){
if(!a[i/K][i%K][0]) continue;
ll sum = 0;
rep(j,L){
sum += b[i][j] * c[j] % mod;
sum %= mod;
}
ans += sum;
ans %= mod;
}
cout << ans << "\n";
}
suta28407928