結果
| 問題 |
No.849 yuki国の分割統治
|
| コンテスト | |
| ユーザー |
 lumc_
|
| 提出日時 | 2019-07-05 23:25:29 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 7,486 bytes |
| コンパイル時間 | 1,390 ms |
| コンパイル使用メモリ | 131,856 KB |
| 実行使用メモリ | 11,392 KB |
| 最終ジャッジ日時 | 2024-10-06 23:12:34 |
| 合計ジャッジ時間 | 4,215 ms |
|
ジャッジサーバーID （参考情報） |
judge4 / judge1 |
（要ログイン）
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 14 WA * 12 |
コンパイルメッセージ
main.cpp: In function 'int main()':
main.cpp:243:10: warning: narrowing conversion of 'a' from 'll' {aka 'long long int'} to 'double' [-Wnarrowing]
243 | Mat v{{a, c}, {b, d}};
| ^
main.cpp:243:10: warning: narrowing conversion of 'a' from 'll' {aka 'long long int'} to 'double' [-Wnarrowing]
main.cpp:243:13: warning: narrowing conversion of 'c' from 'll' {aka 'long long int'} to 'double' [-Wnarrowing]
243 | Mat v{{a, c}, {b, d}};
| ^
main.cpp:243:13: warning: narrowing conversion of 'c' from 'll' {aka 'long long int'} to 'double' [-Wnarrowing]
main.cpp:243:18: warning: narrowing conversion of 'b' from 'll' {aka 'long long int'} to 'double' [-Wnarrowing]
243 | Mat v{{a, c}, {b, d}};
| ^
main.cpp:243:18: warning: narrowing conversion of 'b' from 'll' {aka 'long long int'} to 'double' [-Wnarrowing]
main.cpp:243:21: warning: narrowing conversion of 'd' from 'll' {aka 'long long int'} to 'double' [-Wnarrowing]
243 | Mat v{{a, c}, {b, d}};
| ^
main.cpp:243:21: warning: narrowing conversion of 'd' from 'll' {aka 'long long int'} to 'double' [-Wnarrowing]
main.cpp:255:16: warning: narrowing conversion of 'x[i]' from 'll' {aka 'long long int'} to 'double' [-Wnarrowing]
255 | Mat z({{x[i]}, {y[i]}});
| ~~~^
main.cpp:255:16: warning: narrowing conversion of 'x[i]' from 'll' {aka 'long long int'} to 'double' [-Wnarrowing]
main.cpp:255:24: warning: narrowing conversion of 'y[i]' from 'll' {aka 'long long int'} to 'double' [-Wnarrowing]
255 | Mat z({{x[i]}, {y[i]}});
| ~~~^
main.cpp:255:24: warning: narrowing conversion of 'y[i]' from 'll' {aka 'long long int'} to 'double' [-Wnarrowing]
ソースコード
// includes {{{
#include<iostream>
#include<iomanip>
#include<algorithm>
#include<vector>
#include<stack>
#include<queue>
#include<map>
#include<set>
#include<tuple>
#include<cmath>
#include<random>
#include<cassert>
#include<bitset>
#include<cstdlib>
// #include<deque>
// #include<multiset>
// #include<cstring>
// #include<bits/stdc++.h>
// }}}
using namespace std;
using ll = long long;
// #undef DEBUG
// #define DEBUG
// DEBUG {{{
#include <array>
#include <deque>
#include <iostream>
#include <list>
#include <queue>
#include <stack>
#include <tuple>
#include <valarray>
#include <vector>
template < int n, class... T >
typename std::enable_if< (n >= sizeof...(T)) >::type __output_tuple(
std::ostream &, std::tuple< T... > const &) {}
template < int n, class... T >
typename std::enable_if< (n < sizeof...(T)) >::type __output_tuple(
std::ostream &os, std::tuple< T... > const &t) {
os << (n == 0 ? "" : ", ") << std::get< n >(t);
__output_tuple< n + 1 >(os, t);
}
template < class... T >
std::ostream &operator<<(std::ostream &os, std::tuple< T... > const &t) {
os << "(";
__output_tuple< 0 >(os, t);
os << ")";
return os;
}
template < class T, class U >
std::ostream &operator<<(std::ostream &os, std::pair< T, U > const &p) {
os << "(" << p.first << ", " << p.second << ")";
return os;
}
template < class T >
std::ostream &operator<<(std::ostream &os, const std::stack< T > &a) {
os << "{";
for(auto tmp = a; tmp.size(); tmp.pop())
os << (a.size() == tmp.size() ? "" : ", ") << tmp.top();
os << "}";
return os;
}
template < class T, class Container, class Compare >
std::ostream &operator<<(std::ostream &os,
std::priority_queue< T, Container, Compare > a) {
os << "{ (top) ";
while(a.size()) os << a.top() << (a.size() == 1 ? "" : ", "), a.pop();
os << " }";
return os;
}
template < class T, class Container >
std::ostream &operator<<(std::ostream &os, std::queue< T, Container > a) {
os << "{ ";
while(a.size()) os << a.front() << (a.size() == 1 ? "" : ", "), a.pop();
os << " }";
return os;
}
#ifdef DEBUG
#if !defined(DEBUG_OUT)
#define DEBUG_OUT std::cerr
#endif
#define dump(...) \
[&]() { \
auto __debug_tap = std::make_tuple(__VA_ARGS__); \
DEBUG_OUT << "[" << __LINE__ << "] " << #__VA_ARGS__ << " = " << __debug_tap \
<< std::endl; \
}()
template < class T >
inline void dump2D(T &d, size_t sizey, size_t sizex) {
for(size_t i = 0; i < sizey; i++) {
DEBUG_OUT << "\t";
for(size_t j = 0; j < sizex; j++)
DEBUG_OUT << d[i][j] << (j + 1 == sizex ? "" : "\t");
DEBUG_OUT << std::endl;
}
}
template < class T >
inline void dump1D(T &d, size_t sizey) {
for(size_t i = 0; i < sizey; i++) {
DEBUG_OUT << d[i] << (i + 1 == sizey ? "" : " ");
}
DEBUG_OUT << std::endl;
}
template <
class T, class = typename std::iterator_traits< decltype(begin(T())) >::value_type,
class = typename std::enable_if< !std::is_same< T, std::string >::value >::type >
std::ostream &operator<<(std::ostream &os, const T &a) {
os << "{";
for(auto ite = begin(a); ite != end(a); ++ite)
os << (ite == begin(a) ? "" : ", ") << *ite;
os << "}";
return os;
}
#else
#define dump(...) ((void) 42)
#define dump2D(...) ((void) 42)
#define dump1D(...) ((void) 42)
template <
class T, class = typename std::iterator_traits< decltype(begin(T())) >::value_type,
class = typename std::enable_if< !std::is_same< T, std::string >::value >::type >
std::ostream &operator<<(std::ostream &os, const T &a) {
for(auto ite = begin(a); ite != end(a); ++ite)
os << (ite == begin(a) ? "" : " ") << *ite;
return os;
}
#endif
// }}}
/// --- math {{{ ///
ll gcd(ll a, ll b) { return b == 0 ? a : gcd(b, a % b); }
ll lcm(ll a, ll b) { return a / gcd(a, b) * b; }
ll extgcd(ll a, ll b, ll &x, ll &y) {
ll d;
return b == 0 ? (x = a < 0 ? -1 : 1, y = 0, a < 0 ? -a : a)
: (d = extgcd(b, a % b, y, x), y -= a / b * x, d);
}
ll modinv(ll a, ll mod) {
ll x, y;
extgcd(a, mod, x, y);
if(x < 0) x += mod;
return x;
}
ll modpow(ll a, ll b, ll mod) {
ll r = 1;
a %= mod;
while(b) {
if(b & 1) r = r * a % mod;
a = a * a % mod;
b >>= 1;
}
return r;
}
/// }}}--- ///
// mult(a, b), makeE(n), pow(a, k)
/// --- Matrix mult pow Library {{{ ///
#include <vector>
template < class T >
std::vector< std::vector< T > > mult(std::vector< std::vector< T > > a,
std::vector< std::vector< T > > b) {
assert(a[0].size() == b.size());
std::vector< std::vector< T > > res(a.size(), std::vector< T >(b[0].size(), 0));
for(std::size_t i = 0; i < a.size(); i++) {
for(std::size_t j = 0; j < b[0].size(); j++) {
for(std::size_t k = 0; k < b.size(); k++) {
res[i][j] += a[i][k] * b[k][j];
}
}
}
return res;
}
template < class T >
std::vector< std::vector< T > > makeE(std::size_t n) {
std::vector< std::vector< T > > r(n, std::vector< T >(n, 0));
for(std::size_t i = 0; i < n; i++) r[i][i] = 1;
return r;
}
template < class T >
std::vector< std::vector< T > > pow(std::vector< std::vector< T > > a,
unsigned long long k) {
assert(a.size() == a[0].size());
std::vector< std::vector< T > > r = makeE< T >(a.size());
while(k) {
if(k & 1) r = mult(r, a);
a = mult(a, a);
k >>= 1;
}
return r;
}
/// }}}--- ///
// using Vec = std::vector< modint >;
// using Mat = std::vector< Vec >;
using Vec = vector<double>;
using Mat = vector<Vec>;
Mat inv2(Mat v) {
Mat r(2, Vec(2));
// ad - bc
double k = v[0][0] * v[1][1] - v[0][1] * v[1][0];
r[0][0] = v[1][1] / k;
r[1][1] = v[0][0] / k;
r[0][1] = -v[0][1] / k;
r[1][0] = -v[1][0] / k;
return r;
}
ll x[112345], y[112345];
int main() {
std::ios::sync_with_stdio(false), std::cin.tie(0);
ll a, b, c, d;
cin >> a >> b >> c >> d;
if(a > c) swap(a, c), swap(b, d);
int n;
cin >> n;
for(int i = 0; i < n; i++) {
cin >> x[i] >> y[i];
}
// a/b == c/d
if(a * d == c * b) {
ll dx = a != 0 || c != 0 ? gcd(a, c) : gcd(b, d);
ll dy = b * a / dx;
int ans = 0;
// dx * y切片 で分ける
set<ll> st;
for(int i = 0; i < n; i++) {
st.emplace(dx * y[i] - dy * x[i]);
}
ans = st.size();
cout << ans << endl;
return 0;
}
Mat v{{a, c}, {b, d}};
Mat w = inv2(v);
// dump(w);
// dump(floor(-.5));
set<pair<ll, ll>> st;
constexpr double EPS = 1e-9;
cout << fixed << setprecision(20);
for(int i = 0; i < n; i++) {
// dump(i);
Mat z({{x[i]}, {y[i]}});
Mat t = mult(w, z);
double k1 = t[0][0] - floor(t[0][0]), k2 = t[1][0] - floor(t[1][0]);
ll l1 = floor(t[0][0]), l2 = floor(t[1][0]);
if(k1 > 1 - EPS) k1 -= 1, l1++;
if(k2 > 1 - EPS) k2 -= 1, l2++;
// if(k1 < -1 + EPS) k1 += 1, l1--;
// if(k2 < -1 + EPS) k2 += 1, l2--;
double xx = 0, yy = 0;
xx = k1 * a + k2 * c;
yy = k1 * b + k2 * d;
// dump(t);
// dump(z);
// dump(k1, k2);
// dump(i);
// dump(xx, yy);
auto p = make_pair<ll, ll>(round(xx), round(yy));
st.emplace(p);
// dump(p);
// assert(p.first + l1 * a + l2 * c == x[i]);
// assert(p.second + l1 * b + l2 * d == y[i]);
}
// dump(st);
cout << st.size() << endl;
return 0;
}