結果
| 問題 | No.2890 Chiffon |
| ユーザー |
 noya2
|
| 提出日時 | 2024-09-13 23:19:49 |
| 言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
TLE
(最新)
AC
(最初)
|
| 実行時間 | - |
| コード長 | 7,206 bytes |
| コンパイル時間 | 3,582 ms |
| コンパイル使用メモリ | 256,552 KB |
| 実行使用メモリ | 100,868 KB |
| 最終ジャッジ日時 | 2024-09-26 02:48:32 |
| 合計ジャッジ時間 | 49,752 ms |
|
ジャッジサーバーID （参考情報） |
judge1 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 51 TLE * 1 |
ソースコード
#line 2 "/Users/noya2/Desktop/Noya2_library/template/template.hpp"using namespace std;#include<bits/stdc++.h>#line 1 "/Users/noya2/Desktop/Noya2_library/template/inout_old.hpp"namespace noya2 {template <typename T, typename U>ostream &operator<<(ostream &os, const pair<T, U> &p){os << p.first << " " << p.second;return os;}template <typename T, typename U>istream &operator>>(istream &is, pair<T, U> &p){is >> p.first >> p.second;return is;}template <typename T>ostream &operator<<(ostream &os, const vector<T> &v){int s = (int)v.size();for (int i = 0; i < s; i++) os << (i ? " " : "") << v[i];return os;}template <typename T>istream &operator>>(istream &is, vector<T> &v){for (auto &x : v) is >> x;return is;}void in() {}template <typename T, class... U>void in(T &t, U &...u){cin >> t;in(u...);}void out() { cout << "\n"; }template <typename T, class... U, char sep = ' '>void out(const T &t, const U &...u){cout << t;if (sizeof...(u)) cout << sep;out(u...);}template<typename T>void out(const vector<vector<T>> &vv){int s = (int)vv.size();for (int i = 0; i < s; i++) out(vv[i]);}struct IoSetup {IoSetup(){cin.tie(nullptr);ios::sync_with_stdio(false);cout << fixed << setprecision(15);cerr << fixed << setprecision(7);}} iosetup_noya2;} // namespace noya2#line 1 "/Users/noya2/Desktop/Noya2_library/template/const.hpp"namespace noya2{const int iinf = 1'000'000'007;const long long linf = 2'000'000'000'000'000'000LL;const long long mod998 = 998244353;const long long mod107 = 1000000007;const long double pi = 3.14159265358979323;const vector<int> dx = {0,1,0,-1,1,1,-1,-1};const vector<int> dy = {1,0,-1,0,1,-1,-1,1};const string ALP = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";const string alp = "abcdefghijklmnopqrstuvwxyz";const string NUM = "0123456789";void yes(){ cout << "Yes\n"; }void no(){ cout << "No\n"; }void YES(){ cout << "YES\n"; }void NO(){ cout << "NO\n"; }void yn(bool t){ t ? yes() : no(); }void YN(bool t){ t ? YES() : NO(); }} // namespace noya2#line 2 "/Users/noya2/Desktop/Noya2_library/template/utils.hpp"#line 6 "/Users/noya2/Desktop/Noya2_library/template/utils.hpp"namespace noya2{unsigned long long inner_binary_gcd(unsigned long long a, unsigned long long b){if (a == 0 || b == 0) return a + b;int n = __builtin_ctzll(a); a >>= n;int m = __builtin_ctzll(b); b >>= m;while (a != b) {int mm = __builtin_ctzll(a - b);bool f = a > b;unsigned long long c = f ? a : b;b = f ? b : a;a = (c - b) >> mm;}return a << std::min(n, m);}template<typename T> T gcd_fast(T a, T b){ return static_cast<T>(inner_binary_gcd(std::abs(a),std::abs(b))); }long long sqrt_fast(long long n) {if (n <= 0) return 0;long long x = sqrt(n);while ((x + 1) * (x + 1) <= n) x++;while (x * x > n) x--;return x;}template<typename T> T floor_div(const T n, const T d) {assert(d != 0);return n / d - static_cast<T>((n ^ d) < 0 && n % d != 0);}template<typename T> T ceil_div(const T n, const T d) {assert(d != 0);return n / d + static_cast<T>((n ^ d) >= 0 && n % d != 0);}template<typename T> void uniq(std::vector<T> &v){std::sort(v.begin(),v.end());v.erase(unique(v.begin(),v.end()),v.end());}template <typename T, typename U> inline bool chmin(T &x, U y) { return (y < x) ? (x = y, true) : false; }template <typename T, typename U> inline bool chmax(T &x, U y) { return (x < y) ? (x = y, true) : false; }template<typename T> inline bool range(T l, T x, T r){ return l <= x && x < r; }} // namespace noya2#line 8 "/Users/noya2/Desktop/Noya2_library/template/template.hpp"#define rep(i,n) for (int i = 0; i < (int)(n); i++)#define repp(i,m,n) for (int i = (m); i < (int)(n); i++)#define reb(i,n) for (int i = (int)(n-1); i >= 0; i--)#define all(v) (v).begin(),(v).end()using ll = long long;using ld = long double;using uint = unsigned int;using ull = unsigned long long;using pii = pair<int,int>;using pll = pair<ll,ll>;using pil = pair<int,ll>;using pli = pair<ll,int>;namespace noya2{/* ~ (. _________ . /) */}using namespace noya2;#line 2 "c.cpp"void solve1(){int n, k; in(n,k);vector<int> a(k); in(a);rep(i,k) a.emplace_back(a[i]+n*2);vector<int> nxt(n*2+1,k*2);rep(i,k*2){int j = (a[i]-1)/2;while (j >= 0 && nxt[j] == k*2){nxt[j--] = i;}}auto jump = [&](int from, int step){int to = (a[nxt[from]]+1)/2;if (to - from < step){to = from + step;}if (to > n*2) return -1;if (nxt[to] - nxt[from] == 1) return to;return -1;};int le = 0, ri = n;const int mx = 22;while (ri - le > 1){int md = (le + ri) / 2;// step = md*2vector<vector<int>> to(mx,vector<int>(n*2,-1));rep(i,n*2){// from i*2to[0][i] = jump(i,md);}repp(d,1,mx){rep(i,n*2){if (to[d-1][i] == -1 || to[d-1][i] == n*2) continue;to[d][i] = to[d-1][to[d-1][i]];}}bool ok = false;rep(i,n){int cur = i;reb(d,mx){if (cur == -1 || cur == n*2) break;if (k >> d & 1){cur = to[d][cur];}}if (cur == -1) continue;if (cur <= i+n){ok = true;break;}}if (ok){le = md;}else {ri = md;}}out(le*2);}void solve2(){int n, k; in(n,k);vector<int> a(k); in(a);vector<int> nxt(n+1,k);rep(i,k){int j = (a[i]-1)/2;while (j >= 0 && nxt[j] == k){nxt[j--] = i;}}auto jump = [&](int from, int step){assert(nxt[from] < k);int to = (a[nxt[from]]+1)/2;if (to - from < step){to = from + step;}if (to > n) return to;if (nxt[to] - nxt[from] == 1) return to;return -1;};int le = 0, ri = n;while (ri - le > 1){int md = (le + ri) / 2;int cur = 0;rep(t,k){cur = jump(cur,md);if (cur > n){if (t == k-1) break;cur = -1;}if (cur == -1) break;}if (cur == -1){ri = md;continue;}if (cur <= n){le = md;continue;}cur -= n;if (cur*2 > a[0]){ri = md;continue;}rep(t,k){cur = jump(cur,md*2);if (cur > n) cur = -1;if (cur == -1) break;}if (cur == -1){ri = md;}else {le = md;}}out(le*2);}void solve(){solve1();}int main(){int t = 1; //in(t);while (t--) { solve(); }}