結果

問題 No.2667 Constrained Permutation
ユーザー dyktr_06dyktr_06
提出日時 2024-03-08 23:05:11
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 1,588 ms / 2,000 ms
コード長 6,168 bytes
コンパイル時間 2,710 ms
コンパイル使用メモリ 216,136 KB
実行使用メモリ 22,612 KB
最終ジャッジ日時 2024-09-29 20:34:59
合計ジャッジ時間 23,268 ms
ジャッジサーバーID
（参考情報） 		judge2 / judge1
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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
6,816 KB
testcase_01 AC 1 ms
6,816 KB
testcase_02 AC 2 ms
6,820 KB
testcase_03 AC 3 ms
6,816 KB
testcase_04 AC 5 ms
6,816 KB
testcase_05 AC 3 ms
6,820 KB
testcase_06 AC 4 ms
6,816 KB
testcase_07 AC 2 ms
6,816 KB
testcase_08 AC 4 ms
6,820 KB
testcase_09 AC 4 ms
6,820 KB
testcase_10 AC 3 ms
6,820 KB
testcase_11 AC 3 ms
6,816 KB
testcase_12 AC 357 ms
9,604 KB
testcase_13 AC 10 ms
6,816 KB
testcase_14 AC 1,107 ms
20,800 KB
testcase_15 AC 509 ms
17,472 KB
testcase_16 AC 347 ms
13,312 KB
testcase_17 AC 93 ms
6,820 KB
testcase_18 AC 1,221 ms
22,456 KB
testcase_19 AC 1,353 ms
21,672 KB
testcase_20 AC 1,376 ms
22,612 KB
testcase_21 AC 712 ms
21,860 KB
testcase_22 AC 723 ms
21,644 KB
testcase_23 AC 736 ms
21,788 KB
testcase_24 AC 677 ms
11,184 KB
testcase_25 AC 1,260 ms
18,088 KB
testcase_26 AC 1,588 ms
20,912 KB
testcase_27 AC 1,410 ms
21,176 KB
testcase_28 AC 58 ms
10,240 KB
testcase_29 AC 53 ms
9,728 KB
testcase_30 AC 60 ms
10,628 KB
testcase_31 AC 36 ms
7,936 KB
testcase_32 AC 9 ms
6,820 KB
testcase_33 AC 155 ms
20,792 KB
testcase_34 AC 80 ms
13,084 KB
testcase_35 AC 162 ms
14,592 KB
testcase_36 AC 119 ms
13,952 KB
testcase_37 AC 112 ms
15,360 KB
testcase_38 AC 477 ms
16,384 KB
testcase_39 AC 6 ms
6,816 KB
testcase_40 AC 1,556 ms
12,560 KB
testcase_41 AC 1,579 ms
18,188 KB
testcase_42 AC 338 ms
14,068 KB
testcase_43 AC 493 ms
18,460 KB
testcase_44 AC 319 ms
10,240 KB
testcase_45 AC 8 ms
6,820 KB
権限があれば一括ダウンロードができます

ソースコード

diff # 

#include <bits/stdc++.h>

using namespace std;

#define overload4(_1, _2, _3, _4, name, ...) name
#define rep1(n) for(int i = 0; i < (int)(n); ++i)
#define rep2(i, n) for(int i = 0; i < (int)(n); ++i)
#define rep3(i, a, b) for(int i = (a); i < (int)(b); ++i)
#define rep4(i, a, b, c) for(int i = (a); i < (int)(b); i += (c))
#define rep(...) overload4(__VA_ARGS__, rep4, rep3, rep2, rep1)(__VA_ARGS__)

#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; --i)
#define ALL(a) (a).begin(), (a).end()
#define Sort(a) (sort((a).begin(), (a).end()))
#define RSort(a) (sort((a).rbegin(), (a).rend()))
#define UNIQUE(a) (a.erase(unique((a).begin(), (a).end()), (a).end()))

typedef long long int ll;
typedef unsigned long long ul;
typedef long double ld;
typedef vector<int> vi;
typedef vector<long long> vll;
typedef vector<char> vc;
typedef vector<string> vst;
typedef vector<double> vd;
typedef vector<long double> vld;
typedef pair<long long, long long> P;

template<class T> long long sum(const T& a){ return accumulate(a.begin(), a.end(), 0LL); }
template<class T> auto min(const T& a){ return *min_element(a.begin(), a.end()); }
template<class T> auto max(const T& a){ return *max_element(a.begin(), a.end()); }

const long long MINF = 0x7fffffffffff;
const long long INF = 0x1fffffffffffffff;
const long long MOD = 998244353;
const long double EPS = 1e-9;
const long double PI = acos(-1);
 
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }

template<typename T1, typename T2> istream &operator>>(istream &is, pair<T1, T2> &p){ is >> p.first >> p.second; return is; }
template<typename T1, typename T2> ostream &operator<<(ostream &os, const pair<T1, T2> &p){ os << "(" << p.first << ", " << p.second << ")"; return os; }
template<typename T> istream &operator>>(istream &is, vector<T> &v){ for(T &in : v) is >> in; return is; }
template<typename T> ostream &operator<<(ostream &os, const vector<T> &v){ for(int i = 0; i < (int) v.size(); ++i){ os << v[i] << (i + 1 != (int) v.size() ? " " : ""); } return os; }
template <typename T, typename S> ostream &operator<<(ostream &os, const map<T, S> &mp){ for(auto &[key, val] : mp){ os << key << ":" << val << " "; } return os; }
template <typename T> ostream &operator<<(ostream &os, const set<T> &st){ auto itr = st.begin(); for(int i = 0; i < (int)st.size(); ++i){ os << *itr << (i + 1 != (int)st.size() ? " " : ""); itr++; } return os; }
template <typename T> ostream &operator<<(ostream &os, const multiset<T> &st){ auto itr = st.begin(); for(int i = 0; i < (int)st.size(); ++i){ os << *itr << (i + 1 != (int)st.size() ? " " : ""); itr++; } return os; }
template <typename T> ostream &operator<<(ostream &os, queue<T> q){ while(q.size()){ os << q.front() << " "; q.pop(); } return os; }
template <typename T> ostream &operator<<(ostream &os, deque<T> q){ while(q.size()){ os << q.front() << " "; q.pop_front(); } return os; }
template <typename T> ostream &operator<<(ostream &os, stack<T> st){ while(st.size()){ os << st.top() << " "; st.pop(); } return os; }
template <class T, class Container, class Compare> ostream &operator<<(ostream &os, priority_queue<T, Container, Compare> pq){ while(pq.size()){ os << pq.top() << " "; pq.pop(); } return os; }

template<class T, class U> inline T vin(T& vec, U n) { vec.resize(n); for(int i = 0; i < (int) n; ++i) cin >> vec[i]; return vec; }
template<class T> inline void vout(T vec, string s = "\n"){ for(auto x : vec) cout << x << s; }
template<class... T> void in(T&... a){ (cin >> ... >> a); }
void out(){ cout << '\n'; }
template<class T, class... Ts> void out(const T& a, const Ts&... b){ cout << a; (cout << ... << (cout << ' ', b)); cout << '\n'; }
template<class T, class U> void inGraph(vector<vector<T>>& G, U n, U m, bool directed = false){ G.resize(n); for(int i = 0; i < m; ++i){ int a, b; cin >> a >> b; a--, b--; G[a].push_back(b); if(!directed) G[b].push_back(a); } }

ll n;
vll l, r;

void input(){
    in(n);
    l.resize(n);
    r.resize(n);
    rep(i, n) in(l[i], r[i]);
}

void solve(){

    auto check = [&](ll x){
        priority_queue<ll, vll, greater<>> q;
        vector<vll> mp(n + 1);
        rep(i, n){
            if(l[i] <= x && x <= r[i]){
                q.push(r[i]);
            }
            if(x < l[i] && l[i] <= x + n){
                mp[l[i] - x].push_back(r[i]);
            }
        }

        rep(i, x, x + n){
            if(q.empty()){
                return false;
            }
            if(q.top() < i){
                return false;
            }
            q.pop();
            for(auto x : mp[i - x + 1]){
                q.push(x);
            }
        }
        return true;
    };

    vector<P> p1(n), p2(n);
    rep(i, n){
    	p1[i] = {r[i], l[i]};
        p2[i] = {l[i], r[i]};
    }
    Sort(p1);
    Sort(p2);
    ll mn = min(l), mx = max(r) - (n - 1);
    rep(i, n){
        auto [pr, pl] = p1[i];
        chmax(mn, pl - (n - 1));
        chmin(mx, pr + (n - i - 1));
    }
    rep(i, n){
        auto [pl, pr] = p2[i];
        chmax(mn, pl - i);
        chmin(mx, pr + (n - i - 1));
    }
    if(mn > mx){
        out(0);
        return;
    }
    
    ll init = -1;
    ll ti = clock();
    rep(i, mn, mx + 1){
        if(clock() - ti > 150 * CLOCKS_PER_SEC / 100) break;
        if(check(i)){
            init = i;
            break;
        }
    }
    if(init == -1){
        out(0);
        return;
    }

    ll okl = init, okr = init;
    {
        ll ng = 0;
        while(abs(okl - ng) > 1){
            ll mid = (okl + ng) / 2;
            if(check(mid)){
                okl = mid;
            }else{
                ng = mid;
            }
        }
    }
    {
        ll ng = 1e9 + 1;
        while(abs(okr - ng) > 1){
            ll mid = (okr + ng) / 2;
            if(check(mid)){
                okr = mid;
            }else{
                ng = mid;
            }
        }
    }
    out(okr - okl + 1);
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout << fixed << setprecision(20);
    
    input();
    solve();
}
0