結果
問題 | No.2500 Products in a Range |
ユーザー | 👑 AngrySadEight |
提出日時 | 2023-10-13 22:27:56 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 26 ms / 2,000 ms |
コード長 | 7,955 bytes |
コンパイル時間 | 5,491 ms |
コンパイル使用メモリ | 228,516 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-09-15 18:12:33 |
合計ジャッジ時間 | 7,412 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | AC | 2 ms
5,376 KB |
testcase_07 | AC | 3 ms
5,376 KB |
testcase_08 | AC | 12 ms
5,376 KB |
testcase_09 | AC | 2 ms
5,376 KB |
testcase_10 | AC | 7 ms
5,376 KB |
testcase_11 | AC | 9 ms
5,376 KB |
testcase_12 | AC | 4 ms
5,376 KB |
testcase_13 | AC | 2 ms
5,376 KB |
testcase_14 | AC | 7 ms
5,376 KB |
testcase_15 | AC | 2 ms
5,376 KB |
testcase_16 | AC | 13 ms
5,376 KB |
testcase_17 | AC | 3 ms
5,376 KB |
testcase_18 | AC | 8 ms
5,376 KB |
testcase_19 | AC | 12 ms
5,376 KB |
testcase_20 | AC | 14 ms
5,376 KB |
testcase_21 | AC | 3 ms
5,376 KB |
testcase_22 | AC | 4 ms
5,376 KB |
testcase_23 | AC | 14 ms
5,376 KB |
testcase_24 | AC | 5 ms
5,376 KB |
testcase_25 | AC | 12 ms
5,376 KB |
testcase_26 | AC | 11 ms
5,376 KB |
testcase_27 | AC | 12 ms
5,376 KB |
testcase_28 | AC | 11 ms
5,376 KB |
testcase_29 | AC | 4 ms
5,376 KB |
testcase_30 | AC | 4 ms
5,376 KB |
testcase_31 | AC | 2 ms
5,376 KB |
testcase_32 | AC | 3 ms
5,376 KB |
testcase_33 | AC | 4 ms
5,376 KB |
testcase_34 | AC | 7 ms
5,376 KB |
testcase_35 | AC | 2 ms
5,376 KB |
testcase_36 | AC | 2 ms
5,376 KB |
testcase_37 | AC | 2 ms
5,376 KB |
testcase_38 | AC | 2 ms
5,376 KB |
testcase_39 | AC | 2 ms
5,376 KB |
testcase_40 | AC | 2 ms
5,376 KB |
testcase_41 | AC | 2 ms
5,376 KB |
testcase_42 | AC | 2 ms
5,376 KB |
testcase_43 | AC | 2 ms
5,376 KB |
testcase_44 | AC | 2 ms
5,376 KB |
testcase_45 | AC | 2 ms
5,376 KB |
testcase_46 | AC | 2 ms
5,376 KB |
testcase_47 | AC | 11 ms
5,376 KB |
testcase_48 | AC | 2 ms
5,376 KB |
testcase_49 | AC | 2 ms
5,376 KB |
testcase_50 | AC | 8 ms
5,376 KB |
testcase_51 | AC | 8 ms
5,376 KB |
testcase_52 | AC | 14 ms
5,376 KB |
testcase_53 | AC | 3 ms
5,376 KB |
testcase_54 | AC | 2 ms
5,376 KB |
testcase_55 | AC | 11 ms
5,376 KB |
testcase_56 | AC | 13 ms
5,376 KB |
testcase_57 | AC | 26 ms
5,376 KB |
testcase_58 | AC | 4 ms
5,376 KB |
testcase_59 | AC | 17 ms
5,376 KB |
testcase_60 | AC | 3 ms
5,376 KB |
ソースコード
#pragma GCC target("avx2") #pragma GCC optimize("O3") #pragma GCC optimize("unroll-loops") #include <algorithm> #include <atcoder/all> #include <bitset> #include <cassert> #include <cmath> #include <ctime> #include <functional> #include <iomanip> #include <iostream> #include <map> #include <queue> #include <random> #include <set> #include <stack> #include <string> #include <tuple> #include <unordered_map> #include <unordered_set> #include <utility> #include <vector> using namespace std; using namespace atcoder; typedef long long ll; #define rep(i, n) for (int i = 0; i < (int)(n); i++) #define repr(i, n) for (int i = (int)(n)-1; i >= 0; i--) #define repk(i, k, n) for (int i = k; i < (int)(n); i++) #define all(v) v.begin(), v.end() #define mod1 1000000007 #define mod2 998244353 #define mod3 100000007 #define vi vector<int> #define vs vector<string> #define vc vector<char> #define vl vector<ll> #define vb vector<bool> #define vvi vector<vector<int>> #define vvc vector<vector<char>> #define vvl vector<vector<ll>> #define vvb vector<vector<bool>> #define vvvi vector<vector<vector<int>>> #define vvvl vector<vector<vector<ll>>> #define pii pair<int, int> #define pil pair<int, ll> #define pli pair<ll, int> #define pll pair<ll, ll> #define vpii vector<pair<int, int>> #define vpll vector<pair<ll, ll>> #define vvpii vector<vector<pair<int, int>>> #define vvpll vector<vector<pair<ll, ll>>> using mint = modint998244353; template <typename T> void debug(T e) { cerr << e << endl; } template <typename T> void debug(vector<T> &v) { rep(i, v.size()) { cerr << v[i] << " "; } cerr << endl; } template <typename T> void debug(vector<vector<T>> &v) { rep(i, v.size()) { rep(j, v[i].size()) { cerr << v[i][j] << " "; } cerr << endl; } } template <typename T> void debug(vector<pair<T, T>> &v) { rep(i, v.size()) { cerr << v[i].first << " " << v[i].second << endl; } } template <typename T> void debug(set<T> &st) { for (auto itr = st.begin(); itr != st.end(); itr++) { cerr << *itr << " "; } cerr << endl; } template <typename T> void debug(multiset<T> &ms) { for (auto itr = ms.begin(); itr != ms.end(); itr++) { cerr << *itr << " "; } cerr << endl; } template <typename T> void debug(map<T, T> &mp) { for (auto itr = mp.begin(); itr != mp.end(); itr++) { cerr << itr->first << " " << itr->second << endl; } } void debug_out() { cerr << endl; } template <typename Head, typename... Tail> void debug_out(Head H, Tail... T) { cerr << H << " "; debug_out(T...); } ll my_pow(ll x, ll n, ll mod) { // 繰り返し二乗法.x^nをmodで割った余り. ll ret; if (n == 0) { ret = 1; } else if (n % 2 == 1) { ret = (x * my_pow((x * x) % mod, n / 2, mod)) % mod; } else { ret = my_pow((x * x) % mod, n / 2, mod); } return ret; } ll inv(ll x, ll mod) { return my_pow(x, mod - 2, mod); } ll my_gcd(ll a, ll b) { ll ret = 0; if (a < b) { swap(a, b); } if (b == 0) { ret = a; } else { ret = my_gcd(b, a % b); } return ret; } int main() { ll n, l, r; cin >> n >> l >> r; vector<ll> A(n); for (ll i = 0; i < n; i++) { cin >> A[i]; } if (r < 0) { // 答えは最大でも 2 ll ans = 1; for (ll i = 0; i < n; i++) { for (ll j = i + 1; j < n; j++) { if (A[i] * A[j] >= l && A[i] * A[j] <= r) { ans = 2; } } } cout << ans << endl; } else { vector<ll> neg(0); vector<ll> pos(0); ll zero = 0; for (ll i = 0; i < n; i++) { if (A[i] == 0) { zero++; } else if (A[i] < 0) { neg.push_back(A[i]); } else { pos.push_back(A[i]); } } sort(all(neg)); sort(all(pos)); reverse(all(neg)); // 区間の中の最大値,もしくは最小値がわかれば OK if (l < 0 && r == 0) { ll ans = zero; if (ans == n) { cout << ans << endl; } else if (ans == n - 1) { cout << ans + 1 << endl; } else { ans++; for (ll i = 0; i < n; i++) { for (ll j = i + 1; j < n; j++) { if (A[i] * A[j] >= l && A[i] * A[j] < 0) { ans = zero + 2; } } } cout << ans << endl; } } else if (l == 0 && r == 0) { ll ans = zero; if (zero < n) { ans++; } cout << ans << endl; } else if (l < 0 && r > 0) { ll pos_lim = 0; ll neg_lim = 0; if (zero == n) { cout << n << endl; return 0; } if (pos.size() > 0) { for (ll i = 0; i < pos.size() - 1; i++) { if (pos[i] * pos[i + 1] <= r) { pos_lim = i + 1; } } } if (neg.size() > 0) { for (ll i = 0; i < neg.size() - 1; i++) { if (neg[i] * neg[i + 1] <= r) { neg_lim = i + 1; } } } ll ans = max(pos_lim + 1, neg_lim + 1); if (pos.size() > 0 && neg.size() > 0) { for (ll i = 0; i <= pos_lim; i++) { for (ll j = 0; j <= neg_lim; j++) { if (pos[i] * neg[j] >= l) { ans = max(ans, i + j + 2); } } } } cout << ans + zero << endl; } else if (l == 0 && r > 0) { ll ans = zero; if (zero == n) { cout << ans << endl; return 0; } ll pos_lim = 0; ll neg_lim = 0; if (pos.size() > 0) { for (ll i = 0; i < pos.size() - 1; i++) { if (pos[i] * pos[i + 1] <= r) { pos_lim = i + 1; } } } if (neg.size() > 0) { for (ll i = 0; i < neg.size() - 1; i++) { if (neg[i] * neg[i + 1] <= r) { neg_lim = i + 1; } } } cout << zero + max(pos_lim, neg_lim) + 1 << endl; } else if (l > 0 && r > 0) { ll ans = 1; for (ll i = 0; i < pos.size(); i++) { for (ll j = i + 1; j < pos.size(); j++) { if (pos[i] * pos[i + 1] >= l && pos[j - 1] * pos[j] <= r) { ans = max(ans, j - i + 1); } } } for (ll i = 0; i < neg.size(); i++) { for (ll j = i + 1; j < neg.size(); j++) { if (neg[i] * neg[i + 1] >= l && neg[j - 1] * neg[j] <= r) { ans = max(ans, j - i + 1); } } } for (ll i = 0; i < pos.size(); i++) { for (ll j = i + 1; j < pos.size(); j++) { if (pos[i] * pos[j] >= l && pos[i] * pos[j] <= r) { ans = max(ans, 2LL); } } } for (ll i = 0; i < neg.size(); i++) { for (ll j = i + 1; j < neg.size(); j++) { if (neg[i] * neg[j] >= l && neg[i] * neg[j] <= r) { ans = max(ans, 2LL); } } } cout << ans << endl; } } }