結果

問題 No.1340 おーじ君をさがせ
ユーザー Imperi_Night
提出日時 2021-01-15 21:52:46
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 82 ms / 2,000 ms
コード長 7,384 bytes
コンパイル時間 4,425 ms
コンパイル使用メモリ 137,360 KB
最終ジャッジ日時 2025-01-17 19:13:36
ジャッジサーバーID
(参考情報)
judge4 / judge5
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample AC * 3
other AC * 59
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

#line 1 "solve/main.cpp"
#include <algorithm>
#include <array>
#include <bitset>
#include <cassert>
#include <cctype>
#include <chrono>
#include <cmath>
#include <complex>
#include <cstdint>
#include <cstdlib>
#include <deque>
#include <functional>
#include <iomanip>
#include <iostream>
#include <limits>
#include <list>
#include <map>
#include <memory>
#include <numeric>
#include <queue>
#include <random>
#include <set>
#include <stack>
#include <string>
#include <type_traits>
#include <unordered_map>
#include <utility>
#include <vector>
/* template start */
#line 2 "lib/utility/type_alias.hpp"
#line 4 "lib/utility/type_alias.hpp"
using u64 = std::uint64_t;
using u32 = std::uint32_t;
using u16 = std::uint16_t;
using u8 = std::uint8_t;
using i64 = std::int64_t;
using i32 = std::int32_t;
using i16 = std::int16_t;
using i8 = std::int8_t;
using usize = std::size_t;
using isize = std::ptrdiff_t;
i64 operator"" _i64(unsigned long long num) { return i64(num); }
u64 operator"" _u64(unsigned long long num) { return u64(num); }
#line 33 "solve/main.cpp"
#define rep(i, a, b) for (i64 i = (a); (i) < (b); (i)++)
#define all(i) i.begin(), i.end()
#ifdef LOCAL
#define debug(...) \
std::cerr << "LINE: " << __LINE__ << " [" << #__VA_ARGS__ << "]:", \
debug_out(__VA_ARGS__)
#else
#define debug(...)
#endif
void debug_out() { std::cerr << std::endl; }
template <typename Head, typename... Tail>
void debug_out(Head h, Tail... t) {
std::cerr << " " << h;
if (sizeof...(t) > 0) std::cout << " :";
debug_out(t...);
}
template <typename T1, typename T2>
std::ostream& operator<<(std::ostream& os, std::pair<T1, T2> pa) {
return os << pa.first << " " << pa.second;
}
template <typename T>
std::ostream& operator<<(std::ostream& os, std::vector<T> vec) {
for (std::size_t i = 0; i < vec.size(); i++)
os << vec[i] << (i + 1 == vec.size() ? "" : " ");
return os;
}
template <typename T1, typename T2>
inline bool chmax(T1& a, T2 b) {
return a < b && (a = b, true);
}
template <typename T1, typename T2>
inline bool chmin(T1& a, T2 b) {
return a > b && (a = b, true);
}
template <typename Num>
constexpr Num mypow(Num a, u64 b, Num id = 1) {
if (b == 0) return id;
Num x = id;
while (b > 0) {
if (b & 1) x *= a;
b >>= 1;
if (b == 0) break;
a *= a;
}
return x;
}
/* template end */
#line 2 "lib/math/DynamicMatrix.hpp"
#line 6 "lib/math/DynamicMatrix.hpp"
template <typename Field>
class DynamicMatrix {
public:
using value_t = Field;
using size_t = std::size_t;
private:
size_t row, column;
std::vector<std::vector<value_t>> a;
public:
explicit DynamicMatrix(size_t row_ = 0, size_t column_ = 0,
value_t init_ = value_t())
: row(row_),
column(column_),
a(row, std::vector<value_t>(column, init_)) {}
constexpr value_t& operator()(size_t i, size_t j) {
assert(0 <= i && i < row && 0 <= j && j < column);
return a[i][j];
}
constexpr bool operator==(const DynamicMatrix& rhs) {
if (row != rhs.row || column != rhs.column) return false;
for (size_t i = 0; i < row; i++) {
for (size_t j = 0; j < column; j++) {
if (a[i][j] != rhs.a[i][j]) return false;
}
}
return true;
}
constexpr bool operator!=(const DynamicMatrix& rhs) {
return !(*this == rhs);
}
constexpr DynamicMatrix operator+(const DynamicMatrix rhs) {
return DynamicMatrix(*this) += rhs;
}
constexpr DynamicMatrix operator-(const DynamicMatrix rhs) {
return DynamicMatrix(*this) -= rhs;
}
constexpr DynamicMatrix operator*(const DynamicMatrix rhs) {
return DynamicMatrix(*this) *= rhs;
}
constexpr DynamicMatrix& operator+=(const DynamicMatrix& rhs) {
assert(row == rhs.row && column == rhs.column);
for (size_t i = 0; i < row; i++) {
for (size_t j = 0; j < column; j++) {
a[i][j] += rhs.a[i][j];
}
}
return *this;
}
constexpr DynamicMatrix& operator-=(const DynamicMatrix& rhs) {
assert(row == rhs.row && column == rhs.column);
for (size_t i = 0; i < row; i++) {
for (size_t j = 0; j < column; j++) {
a[i][j] -= rhs.a[i][j];
}
}
return *this;
}
constexpr DynamicMatrix& operator*=(const DynamicMatrix& rhs) {
assert(column == rhs.row);
std::vector<std::vector<value_t>> tmp(row,
std::vector<value_t>(rhs.column, 0));
for (size_t r = 0; r < row; r++) {
for (size_t c = 0; c < rhs.column; c++) {
for (size_t i = 0; i < column; i++) {
tmp[r][c] += a[r][i] * rhs.a[i][c];
}
}
}
column = rhs.column;
a = std::move(tmp);
return *this;
}
constexpr static DynamicMatrix id(size_t size) {
DynamicMatrix<Field> tmp(size, size);
for (size_t i = 0; i < size; i++) tmp.a[i][i] = 1;
return tmp;
}
constexpr void LUPdecomposition(DynamicMatrix& P, DynamicMatrix& L,
DynamicMatrix& U) {
assert(row == column);
std::vector<std::vector<value_t>> tmp = a;
P = DynamicMatrix::id(row);
L = DynamicMatrix(row, column, 0);
U = DynamicMatrix(row, column, 0);
for (size_t i = 0; i < row; i++) {
for (size_t j = 0; j < column; j++) {
value_t val = 0;
for (size_t k = 0; k < i; k++) val += L.a[j][k] * U.a[k][i];
if (val != tmp[j][i]) {
std::swap(tmp[i], tmp[j]);
std::swap(P.a[i], P.a[j]);
std::swap(L.a[i], L.a[j]);
break;
}
}
L.a[i][i] = 1;
for (size_t j = i; j < row; j++) {
U.a[i][j] = tmp[i][j];
for (size_t k = 0; k < i; k++) U.a[i][j] -= L.a[i][k] * U.a[k][j];
}
if (U.a[i][i] != 0) {
for (size_t j = i + 1; j < row; j++) {
L.a[j][i] = tmp[j][i];
for (size_t k = 0; k < i; k++) L.a[j][i] -= L.a[j][k] * U.a[k][i];
L.a[j][i] /= U.a[i][i];
}
}
}
}
constexpr value_t det() {
DynamicMatrix<Field> p, l, u;
LUPdecomposition(p, l, u);
size_t cnt = 0;
value_t ret = 0;
for (size_t i = 0; i < row; i++) {
if (p.a[i][i] == 1) continue;
for (size_t j = 1; j < row; j++) {
if (p.a[j][i] == 1) {
std::swap(p.a[i], p.a[j]);
cnt++;
break;
}
}
}
if (cnt & 1)
ret -= 1;
else
ret += 1;
for (size_t i = 0; i < row; i++) ret *= u.a[i][i];
return ret;
}
};
#line 92 "solve/main.cpp"
struct OR{
bool a;
constexpr OR(const u64 x = 0)noexcept:a(x){}
constexpr bool &value() noexcept {return a;}
constexpr OR operator+(const OR rhs)const noexcept{
return OR(*this) += rhs;
}
constexpr OR operator*(const OR rhs)const noexcept{
return OR(*this) *= rhs;
}
constexpr OR &operator+=(const OR rhs) noexcept{
a |= rhs.a;
return *this;
}
constexpr OR &operator*=(const OR rhs) noexcept{
a &= rhs.a;
return *this;
}
};
int main() {
std::cin.tie(nullptr);
std::ios::sync_with_stdio(false);
i64 n,m,t;
std::cin>>n>>m>>t;
DynamicMatrix<OR> edge(n,n,false);
rep(i,0,m){
i64 a,b;
std::cin>>a>>b;
edge(b,a) = true;
}
edge = mypow(edge,t,DynamicMatrix<OR>::id(n));
i64 cnt=0;
rep(i,0,n)if(edge(i,0).value())cnt++;
std::cout<<cnt<<"\n";
return 0;
}
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0