結果
問題 |
No.1995 CHIKA Road
|
ユーザー |
![]() |
提出日時 | 2022-07-01 21:55:49 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 2,951 bytes |
コンパイル時間 | 2,449 ms |
コンパイル使用メモリ | 211,180 KB |
最終ジャッジ日時 | 2025-01-30 02:46:49 |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 2 WA * 35 |
ソースコード
#include<bits/stdc++.h> /* #include<atcoder/all> using namespace atcoder; //using mint = modint1000000007; using mint = modint998244353; */ //g++ -I/opt/ac-library ./**.cpp using namespace std; using ll = long long; using ull = unsigned long long; //const long long MOD = 1000000007; const long long MOD = 998244353; const long double PI = 3.14159265358979; const long long INF = 1LL<<60; template <typename T> bool chmax(T &a, const T& b){if(a < b){a = b;return true;}return false;} template <typename T> bool chmin(T &a, const T& b){if(a > b){a = b;return true;}return false;} #define deb(var) do{cout << #var << " : "; view(var);}while(0) template<typename T> void view(T e){cout << e << endl;} void view(vector<string>& v){cout << endl;for(auto& s :v){view(s);}cout << endl;} template<typename T> void view(vector<T>& v){for(auto& e :v){cout << e << " ";}cout << endl;} template<typename T> void view(vector<vector<T>>& vv){cout << endl;for(auto& v:vv){view(v);}} ll gcd(ll a, ll b){if (b == 0) return a;else return gcd(b, a % b);} ll lcm(ll x,ll y){return ll(x/gcd(x,y))*y;} template<typename T> using min_priority_queue = priority_queue<T, vector<T>, greater<T>>; #define all(x) x.begin(), x.end() #define rall(x) x.rbegin(), x.rend() #define int long long template<class T> struct compress{ vector<int> res; vector<T> comp, A_copy; int n; int siz; //圧縮後の種類数 compress(vector<T>& A){ n = A.size(); res.resize(n); comp = A; A_copy = A; init(); } void init(){ sort(comp.begin(), comp.end()); comp.erase(unique(comp.begin(), comp.end()), comp.end()); siz = comp.size(); for(int i=0; i<n; i++){ res[i] = lower_bound(comp.begin(), comp.end(), A_copy[i]) - comp.begin(); } } //座圧後の最大値 int max() { return comp.size()-1; } //圧縮後の値を渡すと元の値を返す. T raw(int a){ return comp[a]; } //座圧前の値を座圧後の値に変換 int press(T a) { return lower_bound(comp.begin(), comp.end(), a) - comp.begin(); } }; int32_t main() { int n, m; cin >> n >> m; vector<pair<int, int>> I(m); vector<int> v; for (int i=0; i<m; i++) { int a, b; cin >> a >> b; a--; b--; I[i] = {a, b}; v.push_back(a); v.push_back(b); } compress<int> C(v); for (int i=0; i<m; i++) { I[i] = {C.press(I[i].first), C.press(I[i].second)}; } int mx = C.max(); sort(all(I), [&] (pair<int, int> a, pair<int, int> b) { return a.second < b.second; return a.first < b.first; return true; }); vector<int> dp(mx + 1, 0); int best = 0; for (auto [a, b] : I) { chmax(dp[b], best); chmax(dp[b], dp[a] + 1); chmax(best, dp[b]); } int ans = 2 * (n - 1); int res = 0; cout << ans - best << "\n"; }