Submission #250325

#	Time	Username	Problem	Language	Result	Execution time	Memory
250325		mode149256	Pinball (JOI14_pinball)	C++14	100 / 100	650 ms	137592 KiB

pinball

/*input
5 6
2 4 3 5
1 2 2 8
3 6 5 2
4 6 4 7
2 4 3 10
 
3 5
2 4 3 10
1 3 1 20
2 5 4 30
*/
#include <bits/stdc++.h>
using namespace std;
 
namespace my_template {
typedef long long ll;
typedef long double ld;
typedef complex<ld> cd;
 
typedef pair<int, int> pi;
typedef pair<ll, ll> pl;
typedef pair<ld, ld> pd;
 
typedef vector<int> vi;
typedef vector<vi> vii;
typedef vector<ld> vd;
typedef vector<ll> vl;
typedef vector<vl> vll;
typedef vector<pi> vpi;
typedef vector<vpi> vpii;
typedef vector<pl> vpl;
typedef vector<cd> vcd;
typedef vector<pd> vpd;
typedef vector<bool> vb;
typedef vector<vb> vbb;
typedef std::string str;
typedef std::vector<str> vs;
 
#define x first
#define y second
#define debug(...) cout<<"["<<#__VA_ARGS__<<": "<<__VA_ARGS__<<"]\n"
 
const ld PI = 3.14159265358979323846264338327950288419716939937510582097494L;
 
template<typename T>
pair<T, T> operator+(const pair<T, T> &a, const pair<T, T> &b) { return pair<T, T>(a.x + b.x, a.y + b.y); }
template<typename T>
pair<T, T> operator-(const pair<T, T> &a, const pair<T, T> &b) { return pair<T, T>(a.x - b.x, a.y - b.y); }
template<typename T>
T operator*(const pair<T, T> &a, const pair<T, T> &b) { return (a.x * b.x + a.y * b.y); }
template<typename T>
T operator^(const pair<T, T> &a, const pair<T, T> &b) { return (a.x * b.y - a.y * b.x); }
 
template<typename T>
void print(vector<T> vec, string name = "") {
	cout << name;
	for (auto u : vec)
		cout << u << ' ';
	cout << '\n';
}
}
using namespace my_template;
 
const int MOD = 1000000007;
const ll INF = 1e15;
const int MX = 100101;
 
struct tral {
	int a, b, c, d;
};
 
struct node {
	int l, r;
	ll maz;
	node *left = nullptr;
	node *right = nullptr;
	node(int a, int b) : l(a), r(b), maz(INF) { }
	inline void add_left() { if (!left) left = new node(l, (l + r) / 2); }
	inline void add_right() { if (!right) right = new node((l + r) / 2 + 1, r); }
 
	void upd(int pos, ll val) {
		if (l == r) {
			maz = min(maz, val);
			return;
		}
		if (pos <= (l + r) / 2) {
			add_left();
			left->upd(pos, val);
		}
		else {
			add_right();
			right->upd(pos, val);
		}
 
		maz = min((left ? left->maz : INF), (right ? right->maz : INF));
	}
 
	ll get(int a, int b) {
		if (r < a or b < l) return INF;
		else if (a <= l and r <= b) return maz;
		else {
			return min((left ? left->get(a, b) : INF), (right ? right->get(a, b) : INF));
		}
	}
};
 
int main() {
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	int M, N;
	cin >> M >> N;
	vector<tral> sk(M);
	for (int i = 0; i < M; ++i)
	{
		int a, b, c, d; cin >> a >> b >> c >> d;
		sk[i] = {a, b, c, d};
	}
 
	ll ats = INF;
	{
		node Left(1, (int)1e9);
		node Right(1, (int)1e9);
		Left.upd(1, 0);
		Right.upd(N, 0);
 
		for (int i = 0; i < M; ++i)
		{
			ll l = Left.get(sk[i].a, sk[i].b);
			ll r = Right.get(sk[i].a, sk[i].b);
 
			ats = min(ats, l + r + sk[i].d);
			Left.upd(sk[i].c, sk[i].d + l);
			Right.upd(sk[i].c, sk[i].d + r);
		}
	}
 
	if (ats >= INF) printf("-1\n");
	else printf("%lld\n", ats);
 
	// reverse(sk.begin(), sk.end());
}
 
/* Look for:
* special cases (n=1?)
* overflow (ll vs int?)
* the exact constraints (multiple sets are too slow for n=10^6 :( )
* array bounds
*/

• Subtask 1: 11 / 11
• Subtask 2: 18 / 18
• Subtask 3: 22 / 22
• Subtask 4: 49 / 49