結果

問題 No.1043 直列大学
ユーザー KoD
提出日時 2020-05-01 21:58:00
言語 C++17(gcc12)
(gcc 12.3.0 + boost 1.87.0)
結果
AC  
実行時間 30 ms / 2,000 ms
コード長 4,609 bytes
コンパイル時間 3,352 ms
コンパイル使用メモリ 113,816 KB
最終ジャッジ日時 2025-01-10 04:46:14
ジャッジサーバーID
(参考情報)
judge2 / 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 * 28
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

#include <iostream>
#include <algorithm>
#include <utility>
#include <vector>
#include <numeric>
#include <cassert>
template <class T, class U>
inline bool chmin(T &lhs, const U &rhs) {
if (lhs > rhs) {
lhs = rhs;
return true;
}
return false;
}
template <class T, class U>
inline bool chmax(T &lhs, const U &rhs) {
if (lhs < rhs) {
lhs = rhs;
return true;
}
return false;
}
// [l, r) from l to r
struct range {
struct itr {
int i;
constexpr itr(int i_): i(i_) { }
constexpr void operator ++ () { ++i; }
constexpr int operator * () const { return i; }
constexpr bool operator != (itr x) const { return i != x.i; }
};
const itr l, r;
constexpr range(int l_, int r_): l(l_), r(std::max(l_, r_)) { }
constexpr itr begin() const { return l; }
constexpr itr end() const { return r; }
};
// [l, r) from r to l
struct revrange {
struct itr {
int i;
constexpr itr(int i_): i(i_) { }
constexpr void operator ++ () { --i; }
constexpr int operator * () const { return i; }
constexpr bool operator != (itr x) const { return i != x.i; }
};
const itr l, r;
constexpr revrange(int l_, int r_): l(l_ - 1), r(std::max(l_, r_) - 1) { }
constexpr itr begin() const { return r; }
constexpr itr end() const { return l; }
};
template <class T>
class modulo_int {
public:
static constexpr int mod = T::value;
static_assert(mod > 0, "mod must be positive");
private:
long long value;
constexpr void normalize() {
value %= mod;
if (value < 0) value += mod;
}
public:
constexpr modulo_int(long long value_ = 0): value(value_) { normalize(); }
constexpr modulo_int operator - () const { return modulo_int(mod - value); }
constexpr modulo_int operator ~ () const { return power(mod - 2); }
constexpr long long operator () () const { return value; }
constexpr modulo_int operator + (const modulo_int &rhs) const { return modulo_int(*this) += rhs; }
constexpr modulo_int &operator += (const modulo_int &rhs) {
if ((value += rhs.value) >= mod) value -= mod;
return (*this);
}
constexpr modulo_int operator - (const modulo_int &rhs) const { return modulo_int(*this) -= rhs; }
constexpr modulo_int &operator -= (const modulo_int &rhs) {
if ((value += mod - rhs.value) >= mod) value -= mod;
return (*this);
}
constexpr modulo_int operator * (const modulo_int &rhs) const { return modulo_int(*this) *= rhs; }
constexpr modulo_int &operator *= (const modulo_int &rhs) {
(value *= rhs.value) %= mod;
return (*this);
}
constexpr modulo_int operator / (const modulo_int &rhs) const { return modulo_int(*this) /= rhs; }
constexpr modulo_int &operator /= (const modulo_int &rhs) {
return (*this) *= ~rhs;
}
constexpr bool operator == (const modulo_int &rhs) const {
return value == rhs();
}
constexpr bool operator != (const modulo_int &rhs) const {
return value != rhs();
}
constexpr modulo_int power (uint64_t exp) const {
modulo_int result(1), mult(*this);
while (exp > 0) {
if (exp & 1) result *= mult;
mult *= mult;
exp >>= 1;
}
return result;
}
friend std::istream &operator >> (std::istream &stream, modulo_int &lhs) {
stream >> lhs.value;
lhs.normalize();
return stream;
}
friend std::ostream &operator << (std::ostream &stream, const modulo_int &rhs) {
return stream << rhs.value;
}
};
using modint = modulo_int<std::integral_constant<int, 1000000007>>;
constexpr int mx = 1000;
int main() {
int N, M;
std::cin >> N >> M;
std::vector<int> V(N), R(M);
for (int &x: V) {
std::cin >> x;
}
for (int &x: R) {
std::cin >> x;
}
int A, B;
std::cin >> A >> B;
std::vector<modint> vdp(N * mx + 1);
vdp.front() = 1;
for (int i: range(0, N)) {
for (int j: revrange(0, vdp.size())) {
if (j - V[i] >= 0) {
vdp[j] += vdp[j - V[i]];
}
}
}
std::vector<modint> rdp(M * mx + 1);
rdp.front() = 1;
for (int i: range(0, M)) {
for (int j: revrange(0, rdp.size())) {
if (j - R[i] >= 0) {
rdp[j] += rdp[j - R[i]];
}
}
}
std::vector<modint> sum(vdp.size() + 1);
for (int i: range(0, vdp.size())) {
sum[i + 1] += sum[i] + vdp[i];
}
modint ans;
for (int i: range(0, rdp.size())) {
long long ub = std::min((long long) B * i + 1, (long long) vdp.size());
long long lb = std::min((long long) A * i, (long long) vdp.size());
assert(0 <= ub && ub <= vdp.size());
assert(0 <= lb && lb <= vdp.size());
ans += (sum[ub] - sum[lb]) * rdp[i];
}
std::cout << ans - 1 << '\n';
return 0;
}
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