結果
| 問題 |
No.2667 Constrained Permutation
|
| コンテスト | |
| ユーザー |
fuppy_kyopro
|
| 提出日時 | 2024-03-08 22:20:05 |
| 言語 | C++17(gcc12) (gcc 12.3.0 + boost 1.87.0) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 7,483 bytes |
| コンパイル時間 | 12,446 ms |
| コンパイル使用メモリ | 302,988 KB |
| 最終ジャッジ日時 | 2025-02-20 02:35:47 |
|
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 17 TLE * 4 -- * 25 |
ソースコード
//*
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
//*/
#include <bits/stdc++.h>
// #include <atcoder/all>
// #include <atcoder/math>
using namespace std;
// using namespace atcoder;
// #define _GLIBCXX_DEBUG
#define DEBUG(x) cerr << #x << ": " << x << endl;
#define DEBUG_VEC(v) \
cerr << #v << ":"; \
for (int iiiiiiii = 0; iiiiiiii < v.size(); iiiiiiii++) \
cerr << " " << v[iiiiiiii]; \
cerr << endl;
#define DEBUG_MAT(v) \
cerr << #v << endl; \
for (int iv = 0; iv < v.size(); iv++) { \
for (int jv = 0; jv < v[iv].size(); jv++) { \
cerr << v[iv][jv] << " "; \
} \
cerr << endl; \
}
typedef long long ll;
// #define int ll
#define vi vector<int>
#define vl vector<ll>
#define vii vector<vector<int>>
#define vll vector<vector<ll>>
#define pii pair<int, int>
#define pis pair<int, string>
#define psi pair<string, int>
#define pll pair<ll, ll>
template <class S, class T>
pair<S, T> operator+(const pair<S, T> &s, const pair<S, T> &t) {
return pair<S, T>(s.first + t.first, s.second + t.second);
}
template <class S, class T>
pair<S, T> operator-(const pair<S, T> &s, const pair<S, T> &t) { return pair<S, T>(s.first - t.first, s.second - t.second); }
template <class S, class T>
ostream &operator<<(ostream &os, pair<S, T> p) {
os << "(" << p.first << ", " << p.second << ")";
return os;
}
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rep1(i, n) for (int i = 1; i <= (int)(n); i++)
#define rrep(i, n) for (int i = (int)(n)-1; i >= 0; i--)
#define rrep1(i, n) for (int i = (int)(n); i > 0; i--)
#define REP(i, a, b) for (int i = a; i < b; i++)
#define in(x, a, b) (a <= x && x < b)
#define all(c) c.begin(), c.end()
void YES(bool t = true) {
cout << (t ? "YES" : "NO") << endl;
}
void Yes(bool t = true) { cout << (t ? "Yes" : "No") << endl; }
void yes(bool t = true) { cout << (t ? "yes" : "no") << endl; }
void NO(bool t = true) { cout << (t ? "NO" : "YES") << endl; }
void No(bool t = true) { cout << (t ? "No" : "Yes") << endl; }
void no(bool t = true) { cout << (t ? "no" : "yes") << endl; }
template <class T>
bool chmax(T &a, const T &b) {
if (a < b) {
a = b;
return 1;
}
return 0;
}
template <class T>
bool chmin(T &a, const T &b) {
if (a > b) {
a = b;
return 1;
}
return 0;
}
#define UNIQUE(v) v.erase(std::unique(v.begin(), v.end()), v.end());
const ll inf = 1000000001;
const ll INF = (ll)1e18 + 1;
const long double pi = 3.1415926535897932384626433832795028841971L;
int popcount(ll t) { return __builtin_popcountll(t); }
// int dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1};
// int dx2[8] = { 1,1,0,-1,-1,-1,0,1 }, dy2[8] = { 0,1,1,1,0,-1,-1,-1 };
vi dx = {0, 0, -1, 1}, dy = {-1, 1, 0, 0};
vi dx2 = {1, 1, 0, -1, -1, -1, 0, 1}, dy2 = {0, 1, 1, 1, 0, -1, -1, -1};
struct Setup_io {
Setup_io() {
ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
cout << fixed << setprecision(25);
cerr << fixed << setprecision(25);
}
} setup_io;
// constexpr ll MOD = 1000000007;
constexpr ll MOD = 998244353;
// #define mp make_pair
// #define endl '\n'
struct dice {
mt19937 mt;
dice() : mt(chrono::steady_clock::now().time_since_epoch().count()) {}
// [0, x)の一様乱数
ll operator()(ll x) { return this->operator()(0, x); }
// [x, y)の一様乱数
ll operator()(ll x, ll y) {
uniform_int_distribution<ll> dist(x, y - 1);
return dist(mt);
}
vl operator()(int n, ll x, ll y) {
vl res(n);
for (int i = 0; i < n; i++)
res[i] = this->operator()(x, y);
return res;
}
} rnd;
std::random_device seed_gen;
std::mt19937 engine(seed_gen());
ll guchoku(int n, vector<pll> lr) {
rep(i, n) {
lr[i].first--;
}
sort(all(lr), [](const pll &a, const pll &b) {
if (a.second != b.second) return a.second < b.second;
return a.first > b.first;
});
ll ans = 0;
for (ll k = -50; k <= 50; k++) {
bool ok = true;
set<int> alive;
rep(i, n) {
alive.insert(i + k);
}
rep(i, n) {
auto it = alive.lower_bound(lr[i].first);
if (it == alive.end() || *it >= lr[i].second) {
ok = false;
break;
}
alive.erase(it);
}
if (ok) {
ans++;
}
}
return ans;
}
ll solve(int n, vector<pll> lr) {
rep(i, n) {
lr[i].first--;
// if (ls[i] == rs[i]) {
// if (uni.count(ls[i])) {
// return 0;
// }
// uni.insert(ls[i]);
// }
}
sort(all(lr), [](const pll &a, const pll &b) {
if (a.second != b.second) return a.second < b.second;
return a.first > b.first;
});
// ng: k が小さすぎて失敗, ok: セーフ
ll ng = -2e9, ok = 2e9;
while (ng + 1 < ok) {
ll mid = (ng + ok) / 2;
bool is_ok = true;
set<ll> alive;
rep(i, n) {
alive.insert(i + mid);
}
rep(i, n) {
auto it = alive.lower_bound(lr[i].first);
if (it == alive.end()) {
// k が小さすぎるせいで全てが l 以上にならない
is_ok = false;
break;
} else if (*it >= lr[i].second) {
// k が大きすぎるせいで r の範囲を超えてしまう
break;
}
alive.erase(it);
}
if (is_ok) {
ok = mid;
} else {
ng = mid;
}
}
ll ng1 = ng;
// ng: k が大きすぎて失敗, ok: セーフ
ng = 2e9, ok = -2e9;
while (ok + 1 < ng) {
ll mid = (ng + ok) / 2;
bool is_ok = true;
set<ll> alive;
rep(i, n) {
alive.insert(i + mid);
}
rep(i, n) {
auto it = alive.lower_bound(lr[i].first);
if (it == alive.end()) {
// k が小さすぎるせいで全てが l 以上にならない
break;
} else if (*it >= lr[i].second) {
// k が大きすぎるせいで r の範囲を超えてしまう
is_ok = false;
break;
}
alive.erase(it);
}
if (is_ok) {
ok = mid;
} else {
ng = mid;
}
}
ll ng2 = ng;
DEBUG(pll(ng1, ng2));
// (ng1, ng2) がセーフ
return max(0LL, ng2 - (ng1 + 1));
}
signed main() {
int t = 1;
// cin >> t;
while (t--) {
int n = rnd(1, 6);
cin >> n;
vector<pll> lr(n);
rep(i, n) {
cin >> lr[i].first >> lr[i].second;
// lr[i].first = rnd(1, 10);
// lr[i].second = rnd(lr[i].first, 10);
}
ll ans = solve(n, lr);
cout << ans << endl;
return 0;
ll gu = guchoku(n, lr);
DEBUG(gu);
if (ans != gu) {
DEBUG(n);
DEBUG_VEC(lr);
DEBUG(ans);
DEBUG(gu);
assert(ans == gu);
}
}
}
fuppy_kyopro