제출 #560409

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
560409		Yazan_Alattar	Autobahn (COI21_autobahn)	C++14	100 / 100	292 ms	43216 KiB

autobahn

    #include <bits/stdc++.h>
    using namespace std;
    typedef long long ll;
    typedef unsigned long long ull;
    #define F first
    #define S second
    #define pb push_back
    #define endl "\n"
    #define all(x) x.begin(), x.end()
    const int M = 2000007;
    const ll inf = 2e9;
    const ll mod = 1e9 + 7;
    const double pi = acos(-1);
    const double eps = 1e-6;
    const int dx[] = {0, -1, 0, 1}, dy[] = {1, 0, -1, 0};
    const int block = 320;

    vector <ll> v;
    ll n, k, x, l[M], t[M], r[M], cnt[M], tot[M], pref[M], ans;

    void add(ll pos){
        v.pb(pos);
        v.pb(pos + x - 1);
        v.pb(pos - x + 1);
        return;
    }

    ll get(ll val){
        return lower_bound(all(v), val) - v.begin() + 1;
    }

    int main(){
        ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
        cin >> n >> k >> x;
        for(int i = 1; i <= n; ++i){
            cin >> l[i] >> t[i] >> r[i];

            add(l[i]);
            add(l[i] + t[i]);
            add(r[i]);
            add(r[i] + 1);
        }

        sort(all(v));
        v.erase(unique(all(v)), v.end());

        for(int i = 1; i <= n; ++i){
            int to = get(r[i] + 1);
            ++cnt[get(l[i])];
            --cnt[to];

            ++tot[get(l[i] + t[i])];
            --tot[to];
        }
        for(int i = 1; i <= v.size(); ++i) cnt[i] += cnt[i - 1], tot[i] += tot[i - 1];

        for(int i = 1; i <= v.size(); ++i){
            pref[i] = pref[i - 1];
            if(cnt[i - 1] >= k) pref[i] += (v[i - 1] - v[i - 2]) * tot[i - 1]; // [l, r[
        }

        for(int i = 0; i < v.size(); ++i){
            int posi = i + 1;
            int posj = get(v[i] + x - 1);

            if(posj > v.size()) break;
            if(v[posj - 1] != v[i] + x - 1) continue;

            ans = max(ans, pref[posj] - pref[posi] + (cnt[posj] >= k) * tot[posj]);
        }
        cout << ans << endl;
        return 0;
    }

컴파일 시 표준 에러 (stderr) 메시지

autobahn.cpp: In function 'int main()':
autobahn.cpp:55:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |         for(int i = 1; i <= v.size(); ++i) cnt[i] += cnt[i - 1], tot[i] += tot[i - 1];
      |                        ~~^~~~~~~~~~~
autobahn.cpp:57:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |         for(int i = 1; i <= v.size(); ++i){
      |                        ~~^~~~~~~~~~~
autobahn.cpp:62:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |         for(int i = 0; i < v.size(); ++i){
      |                        ~~^~~~~~~~~~
autobahn.cpp:66:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |             if(posj > v.size()) break;
      |                ~~~~~^~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 50 / 50