結果
| 問題 |
No.2500 Products in a Range
|
| コンテスト | |
| ユーザー |
だれ
|
| 提出日時 | 2023-10-13 21:58:57 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
RE
|
| 実行時間 | - |
| コード長 | 6,839 bytes |
| コンパイル時間 | 3,549 ms |
| コンパイル使用メモリ | 197,620 KB |
| 最終ジャッジ日時 | 2025-02-17 07:16:21 |
|
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 37 RE * 24 |
ソースコード
#include <algorithm>
#include <bitset>
#include <cassert>
#include <cmath>
#include <complex>
#include <cstdio>
#include <fstream>
#include <functional>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <map>
#include <numeric>
#include <queue>
#include <random>
#include <set>
#include <sstream>
#include <stack>
#include <unordered_set>
using namespace std;
#if __has_include(<atcoder/all>)
#include <atcoder/all>
#endif
#define GET_MACRO(_1, _2, _3, NAME, ...) NAME
#define _rep(i, n) _rep2(i, 0, n)
#define _rep2(i, a, b) for (int i = (int)(a); i < (int)(b); i++)
#define rep(...) GET_MACRO(__VA_ARGS__, _rep2, _rep)(__VA_ARGS__)
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define UNIQUE(x) \
std::sort((x).begin(), (x).end()); \
(x).erase(std::unique((x).begin(), (x).end()), (x).end())
using i64 = long long;
template <class T, class U>
bool chmin(T& a, const U& b) {
return (b < a) ? (a = b, true) : false;
}
template <class T, class U>
bool chmax(T& a, const U& b) {
return (b > a) ? (a = b, true) : false;
}
inline void YesNo(bool f = 0, string yes = "Yes", string no = "No") {
std::cout << (f ? yes : no) << "\n";
}
namespace io {
template <typename T>
istream& operator>>(istream& i, vector<T>& v) {
rep(j, v.size()) i >> v[j];
return i;
}
template <typename T>
string join(vector<T>& v) {
stringstream s;
rep(i, v.size()) s << ' ' << v[i];
return s.str().substr(1);
}
template <typename T>
ostream& operator<<(ostream& o, vector<T>& v) {
if (v.size()) o << join(v);
return o;
}
template <typename T>
string join(vector<vector<T>>& vv) {
string s = "\n";
rep(i, vv.size()) s += join(vv[i]) + "\n";
return s;
}
template <typename T>
ostream& operator<<(ostream& o, vector<vector<T>>& vv) {
if (vv.size()) o << join(vv);
return o;
}
template <class T, class U>
istream& operator>>(istream& i, pair<T, U>& p) {
i >> p.first >> p.second;
return i;
}
template <class T, class U>
ostream& operator<<(ostream& o, pair<T, U>& p) {
o << p.first << " " << p.second;
return o;
}
void print() { cout << "\n"; }
template <class Head, class... Tail>
void print(Head&& head, Tail&&... tail) {
cout << head;
if (sizeof...(tail)) cout << ' ';
print(std::forward<Tail>(tail)...);
}
void in() {}
template <class Head, class... Tail>
void in(Head&& head, Tail&&... tail) {
cin >> head;
in(std::forward<Tail>(tail)...);
}
} // namespace io
using namespace io;
namespace useful {
long long modpow(long long a, long long b, long long mod) {
long long res = 1;
while (b) {
if (b & 1) res *= a, res %= mod;
a *= a;
a %= mod;
b >>= 1;
}
return res;
}
bool is_pow2(long long x) { return x > 0 && (x & (x - 1)) == 0; }
template <class T>
void rearrange(vector<T>& a, vector<int>& p) {
vector<T> b = a;
for (int i = 0; i < int(a.size()); i++) {
a[i] = b[p[i]];
}
return;
}
template <class T>
vector<pair<int, int>> rle_sequence(T& a) {
vector<pair<int, int>> res;
int n = a.size();
if (n == 1) return vector<pair<int, int>>{{a[0], 1}};
int l = 1;
rep(i, n - 1) {
if (a[i] == a[i + 1])
l++;
else {
res.emplace_back(a[i], l);
l = 1;
}
}
res.emplace_back(a.back(), l);
return res;
}
vector<pair<char, int>> rle_string(string a) {
vector<pair<char, int>> res;
int n = a.size();
if (n == 1) return vector<pair<char, int>>{{a[0], 1}};
int l = 1;
rep(i, n - 1) {
if (a[i] == a[i + 1])
l++;
else {
res.emplace_back(a[i], l);
l = 1;
}
}
res.emplace_back(a.back(), l);
return res;
}
vector<int> linear_sieve(int n) {
vector<int> primes;
vector<int> res(n + 1);
iota(all(res), 0);
for (int i = 2; i <= n; i++) {
if (res[i] == i) primes.emplace_back(i);
for (auto j : primes) {
if (j * i > n) break;
res[j * i] = j;
}
}
return res;
// return primes;
}
template <class T>
vector<long long> dijkstra(vector<vector<pair<int, T>>>& graph, int start) {
int n = graph.size();
vector<long long> res(n, 2e18);
res[start] = 0;
priority_queue<pair<long long, int>, vector<pair<long long, int>>,
greater<pair<long long, int>>>
que;
que.push({0, start});
while (!que.empty()) {
auto [c, v] = que.top();
que.pop();
if (res[v] < c) continue;
for (auto [nxt, cost] : graph[v]) {
auto x = c + cost;
if (x < res[nxt]) {
res[nxt] = x;
que.push({x, nxt});
}
}
}
return res;
}
} // namespace useful
using namespace useful;
int main() {
cin.tie(nullptr);
ios::sync_with_stdio(false);
i64 n, l, r;
in(n, l, r);
vector<i64> a(n);
in(a);
i64 zero = 0;
vector<i64> pos, neg;
rep(i, n) {
if (a[i] > 0) pos.emplace_back(a[i]);
if (a[i] < 0) neg.emplace_back(a[i]);
if (a[i] == 0) zero++;
}
sort(all(pos));
sort(rall(neg));
if (l > 0) {
assert(false);
int lpos = pos.size(), rpos = 0;
int lneg = neg.size(), rneg = 0;
rep(i, pos.size() - 1) {
if (pos[i] * pos[i + 1] >= l) {
chmin(lpos, i);
}
if (pos[i] * pos[i + 1] <= r) {
chmax(rpos, i + 1);
}
}
rep(i, neg.size() - 1) {
if (neg[i] * neg[i + 1] >= l) {
chmin(lneg, i);
}
if (neg[i] * neg[i + 1] <= r) {
chmax(rneg, i + 1);
}
}
print(max(1, max(rneg - lneg + 1, rpos - lpos + 1)));
return 0;
} else if (r < 0) {
rep(i, pos.size()) rep(j, neg.size()) {
if (pos[i] * neg[j] >= l && pos[i] * neg[j] <= r) {
print(2);
return 0;
}
}
print(1);
return 0;
}
i64 ans = 1;
l *= -1;
rep(i, neg.size()) neg[i] *= -1;
int nr = min(1, (int)neg.size()), pr = min(1, (int)pos.size());
rep(i, pos.size() - 1) {
if (pos[i] * pos[i + 1] <= r) chmax(pr, i + 2);
}
rep(i, neg.size() - 1) {
if (neg[i] * neg[i + 1] <= r) chmax(nr, i + 2);
}
chmax(ans, max(pr, nr) + zero);
rep(j, nr) {
auto k = upper_bound(all(pos), l / neg[j]) - pos.begin();
chmin(k, pr);
chmax(ans, zero + k + (j + 1));
}
rep(j, pr) {
auto k = upper_bound(all(neg), l / pos[j]) - neg.begin();
chmin(k, nr);
chmax(ans, zero + k + (j + 1));
}
assert(ans <= n);
print(ans);
}
だれ