結果
| 問題 |
No.1043 直列大学
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2020-05-02 00:14:05 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
RE
|
| 実行時間 | - |
| コード長 | 3,786 bytes |
| コンパイル時間 | 1,565 ms |
| コンパイル使用メモリ | 170,512 KB |
| 実行使用メモリ | 5,248 KB |
| 最終ジャッジ日時 | 2024-12-25 16:31:38 |
| 合計ジャッジ時間 | 5,393 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 21 RE * 7 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
constexpr char newl = '\n';
// https://noshi91.hatenablog.com/entry/2019/03/31/174006
template <std::uint_fast64_t Modulus>
struct ModInt {
using u64 = std::uint_fast64_t;
static constexpr u64 MOD = Modulus;
u64 val;
constexpr ModInt(const u64 x = 0) noexcept : val(x % MOD) {}
constexpr ModInt operator+() const noexcept { return ModInt(*this); }
constexpr ModInt operator-() const noexcept {
ModInt res(*this);
if (res.val != 0) res.val = MOD - res.val;
return res;
}
// prefix increment/decrement
constexpr ModInt& operator++() noexcept { return *this += ModInt(1); }
constexpr ModInt& operator--() noexcept { return *this -= ModInt(1); }
// postfix increment/decrement
constexpr ModInt& operator++(int) noexcept {
ModInt tmp(*this);
++*this;
return tmp;
}
constexpr ModInt& operator--(int) noexcept {
ModInt tmp(*this);
--*this;
return tmp;
}
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 {
val += rhs.val;
if (val >= Modulus) val -= MOD;
return *this;
}
constexpr ModInt& operator-=(const ModInt& rhs) noexcept {
if (val < rhs.val) val += MOD;
val -= rhs.val;
return *this;
}
constexpr ModInt& operator*=(const ModInt& rhs) noexcept {
val = val * rhs.val % MOD;
return *this;
}
// prime Modulus only
constexpr ModInt& operator/=(const ModInt& rhs) noexcept {
return *this *= rhs.inv();
}
// prime Modulus only
constexpr ModInt inv() const noexcept {
return pow(*this, MOD - 2);
}
};
template<std::uint_fast64_t Modulus>
constexpr ModInt<Modulus> pow(ModInt<Modulus> x, std::uint_fast64_t n) {
ModInt<Modulus> res(1);
while (n) {
if (n & 1) res *= x;
x *= x;
n >>= 1;
}
return res;
}
template<std::uint_fast64_t Modulus>
istream& operator>>(istream& is, ModInt<Modulus>& x) {
std::uint_fast64_t val;
is >> val;
x = ModInt<Modulus>(val);
return is;
}
template<std::uint_fast64_t Modulus>
ostream& operator<<(ostream& os, const ModInt<Modulus>& x) {
return os << x.val;
}
using mint = ModInt<1000000007>;
int main() {
cin.tie(nullptr);
ios::sync_with_stdio(false);
int n, m;
cin >> n >> m;
vector<int> v(n);
int vsum = 0;
for (int i = 0; i < n; i++) {
cin >> v[i];
vsum += v[i];
}
vector<mint> dp_v(vsum + 1, 0);
dp_v[0] = 1;
for (int i = 0; i < n; i++) {
for (int j = vsum; j >= v[i]; j--) {
dp_v[j] += dp_v[j - v[i]];
}
}
for (int i = 1; i <= vsum; i++) {
dp_v[i] += dp_v[i - 1];
}
vector<int> r(m);
int rsum = 0;
for (int i = 0; i < m; i++) {
cin >> r[i];
rsum += r[i];
}
vector<mint> dp_r(rsum + 1, 0);
dp_r[0] = 1;
for (int i = 0; i < m; i++) {
for (int j = rsum; j >= r[i]; j--) {
dp_r[j] += dp_r[j - r[i]];
}
}
int a, b;
cin >> a >> b;
mint ans = 0;
for (int i = 1; i <= rsum; i++) {
ans += (dp_v[min(b * i, vsum)] - dp_v[min(a * i - 1, vsum)]) * dp_r[i];
}
cout << ans << newl;
return 0;
}