제출 #529394

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
529394		jiahng	Autobahn (COI21_autobahn)	C++14	50 / 100	809 ms	524292 KiB

autobahn

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
#define ll int
typedef pair<int,int> pi;
typedef vector <ll> vi;
typedef vector <pi> vpi;
typedef pair<pi, ll> pii;
typedef set <ll> si;
typedef long double ld;
#define f first
#define s second
#define mp make_pair
#define FOR(i,s,e) for(int i=s;i<=int(e);++i)
#define DEC(i,s,e) for(int i=s;i>=int(e);--i)
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define lbd(x, y) lower_bound(all(x), y)
#define ubd(x, y) upper_bound(all(x), y)
#define aFOR(i,x) for (auto i: x)
#define mem(x,i) memset(x,i,sizeof x)
#define fast ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0)
#define MOD 1000000007
#define maxn 2000010
//~ #define getchar_unlocked _getchar_nolock

int N,K,X,l,r,t;

struct node{ // All adds before sets
	int s,m,e,v=0;
	bool init = 0;
	node *l=nullptr,*r;
	bool lazyset = 0;
	int lazy = 0;
	
	node (int ss,int ee){
		s = ss; e = ee; m = (s+e)/2;
	}
	void create(){
		if (s == e) return;
		if (!init){
			init = 1;
			l = new node(s,(s+e)/2); r = new node((s+e)/2+1,e);
		}
	}
	void prop(){
		if (s == e) return;
		create();
		if (lazy != 0){
			l->lazy += lazy; r->lazy += lazy;
			l->v += lazy * (l->e - l->s + 1); r->v += lazy * (r->e - r->s + 1);
		}
		if (lazyset){
			l->lazyset = r->lazyset = 1;
			l->v = r->v = 0;
		}
		lazy = lazyset = 0;
	}
		
	void upd(int a,int b,int c){
		prop();
		if (a > b) return;
		if (a <= s && e <= b){
			v += c * (e - s + 1); lazy += c;
		}else if (a > e || s > b) return;
		else{
			l->upd(a,b,c); r->upd(a,b,c);
			v = l->v + r->v;
		}
	}
	void set(int a,int b){
		prop();
		if (a > b) return;
		if (v == 0) return;
		if (a <= s && e <= b){
			lazyset = 1; v = 0;
		}else if (a > e || s > b) return;
		else{
			l->set(a,b); r->set(a,b);
			v = l->v + r->v;
		}
	}
	int qry(int a,int b){
		prop();
		if (a > b) return 0;
		if (v == 0) return 0;
		if (a <= s && e <= b) return v;
		else if (a > e || s > b) return 0;
		else{
			prop(); return l->qry(a,b) + r->qry(a,b);
		}
	}
}*root;

int32_t main() {
    fast;
    //~ N = readInt(); K = readInt(); X = readInt();
    cin >> N >> K >> X;
    root = new node(1,1e9);
    map <int,int> mp; vi vect;
    //~ vi v2;
    FOR(i,1,N){
		//~ l = readInt(); t = readInt(); r = readInt();
		cin >> l >> t >> r;
		if (l + t <= r){
			vect.pb(l+t);
			root->upd(l + t, r, 1);
		}
		mp[l]++; mp[r+1]--;
		//~ v2.pb(l); v2.pb(r+1);
		vect.pb(l); vect.pb(r);
		vect.pb(l-X+1); vect.pb(r-X+1);
	}
	int cur = 0, pre = 1e9+1; // previous one < K
	aFOR(i,mp){
		root->set(1, i.f-1); break;
	}
	aFOR(i,mp){
		if (cur < K && cur + i.s >= K){
			root->set(pre, i.f-1);
		}	
		cur += i.s;
		//~ cout << "VAL: " << i.f << ' ' << cur << '\n';
		if (cur < K) pre = min(pre, i.f);
		else pre = 1e9+1;
	}
	if (cur < K) root->set(pre, 1e9);
	
	int ans = 0;
	aFOR(i,vect) if (i >= 1){
		//~ cout << i << ' ' << root->qry(i, i + X - 1) << '\n';;
		ans = max(ans, root->qry(i, min((int)1e9, i + X-1)));
	}
	cout << ans;
}

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 0 / 50