結果
| 問題 |
No.2796 Small Matryoshka
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2024-06-28 21:35:20 |
| 言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 3,176 bytes |
| コンパイル時間 | 2,508 ms |
| コンパイル使用メモリ | 156,672 KB |
| 実行使用メモリ | 20,892 KB |
| 最終ジャッジ日時 | 2024-06-28 21:35:26 |
| 合計ジャッジ時間 | 4,660 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 8 WA * 11 |
ソースコード
#include <algorithm>
#include <cassert>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <iostream>
#include <numeric>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <functional>
#include <iomanip>
using namespace std;
using ll = long long;
class range {private: struct I{int x;int operator*(){return x;}bool operator!=(I& lhs){return x<lhs.x;}void operator++(){++x;}};I i,n;
public:range(int n_):i({0}),n({n_}){}range(int i_,int n_):i({i_}),n({n_}){}I& begin(){return i;}I& end(){return n;}};
template<typename T, typename U> ostream& operator<<(ostream& os, const pair<T, U>& p){ return os << "{" << p.first << ", " << p.second << "}"; }
template<typename T> ostream& operator<<(ostream& os, const vector<T>& obj) { os << "{"; for (const auto& e : obj) os << e << ", "; return os << "}"; }
template<typename T> ostream& operator<<(ostream& os, const set<T>& obj) { os << "set{"; for (const auto& e : obj) os << e << ", "; return os << "}"; }
template<typename T, typename U> ostream& operator<<(ostream& os, const map<T, U>& obj) { os << "map{"; for (const auto& e : obj) os << e << ", "; return os << "}"; }
template<typename T> void take(vector<T>& vec, int n) { vec.resize(n); for (int i = 0; i < n; ++i) cin >> vec[i]; }
#ifdef ONLINE_JUDGE
#define dump(expr) ;
#else
#define dump(expr) { cerr << "\033[33m#L" << __LINE__ << ": " << expr << "\033[39m" << endl; }
#endif
template<typename T>
void vec_unique(vector<T>& v) {
ranges::sort(v);
auto result = ranges::unique(v);
v.erase(result.begin(), result.end());
}
template<typename T>
ll vec_index(vector<T>& v, T val) {
auto it = ranges::lower_bound(v, val);
return it - v.begin();
}
namespace solver {
template<typename T1, typename T2> struct In2 {
T1 a; T2 b;
friend std::istream& operator>>(std::istream& is, In2& obj) { T1 t1; T2 t2; is >> t1 >> t2; obj = {t1, t2}; return is; }
};
template<typename T1, typename T2, typename T3> struct In3 {
T1 a; T2 b; T3 c;
friend std::istream& operator>>(std::istream& is, In3& obj) { T1 t1; T2 t2; T3 t3; is >> t1 >> t2 >> t3; obj = {t1, t2, t3}; return is; }
};
int n;
vector<In2<int, int>> rs;
void read() {
cin >> n;
take(rs, n);
}
using RetType = int;
RetType run() {
vector<int> vs;
for (auto p : rs) {
vs.push_back(p.a);
vs.push_back(p.b);
}
vec_unique(vs);
dump(vs);
int M = (int)vs.size();
vector<vector<int>> vs2(M);
for (auto p : rs) {
vs2[vec_index(vs, p.b)].push_back(vec_index(vs, p.a));
}
vector<int> dp(M);
int best = 0;
for (int i : range(vs.size())) {
int cand = i > 0 ? dp[i - 1] : 0;
for (int to : vs2[i]) {
cand = max(cand, 1 + dp[to]);
}
dp[i] = cand;
best = max(cand, best);
}
return n - best;
}
} // namespace
template <typename F>
void run(F f) { if constexpr (std::is_same_v<decltype(f()), void>) f(); else cout << f() << endl; }
int main(int argc, char** argv) {
cerr << fixed << setprecision(12);
cout << fixed << setprecision(12);
int testcase = 1;
if (argc > 1) testcase = atoi(argv[1]);
while (testcase--) {
solver::read();
}
run(solver::run);
}