Submission #306343

#	Time	Username	Problem	Language	Result	Execution time	Memory
306343		syy	Pinball (JOI14_pinball)	C++17	100 / 100	705 ms	84812 KiB

pinball

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
#define FOR(i, a, b) for(ll i = (ll)a; i <= (ll)b; i++)
#define DEC(i, a, b) for(ll i = (ll)a; i >= (ll)b; i--)
typedef pair<ll, ll> pi;
typedef pair<pi, pi> pii;
#define f first
#define s second
typedef vector<ll> vi;
typedef vector<pi> vpi;
typedef vector<pii> vpii;
#define pb push_back
#define pf push_front
#define all(v) v.begin(), v.end()
#define INF (ll) 1e9 + 100
#define LLINF (ll) 1e18
#define fastio ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)

ll m, n, a, b, c, d, ans = LLINF;
vpii v;
vi coord;

struct node {
	ll s, e, m, v;
	node *l, *r;
	node(ll S, ll E) {
		s = S, e = E, m = (s+e)/2, v = LLINF;
		if (s != e) {
			l = new node(s, m);
			r = new node(m+1, e);
		}
	}
	void up(ll x, ll nv) {
		if (s == e) {v = min(v, nv); return;}
		else if (x <= m) l->up(x, nv);
		else r->up(x, nv);
		v = min(l->v, r->v);
	}
	ll query(ll x, ll y) {
		if (s == x and e == y) return v;
		else if (y <= m) return l->query(x, y);
		else if (x > m) return r->query(x, y);
		else return min(l->query(x, m), r->query(m+1, y));
	}
} *lseg, *rseg;

int main() {
	fastio; cin >> m >> n;
	FOR(i, 1, m) {
		cin >> a >> b >> c >> d;
		v.pb(pii(pi(a, b), pi(c, d)));
		coord.pb(a);
		coord.pb(b);
		coord.pb(c);
	}
	coord.pb(1); coord.pb(n);
	sort(all(coord));
	coord.resize(unique(all(coord)) - coord.begin());
	n = coord.size();
	lseg = new node(1, coord.size());
	rseg = new node(1, coord.size());
	for (auto it:v) {
		a = it.f.f, b = it.f.s, c = it.s.f, d = it.s.s;
		a = lower_bound(all(coord), a) - coord.begin() + 1;
		b = lower_bound(all(coord), b) - coord.begin() + 1;
		c = lower_bound(all(coord), c) - coord.begin() + 1;
		ll lv = (a == 1 ? 0 : lseg->query(a, b)) + d;
		ll rv = (b == n ? 0 : rseg->query(a, b)) + d;
		lseg->up(c, lv);
		rseg->up(c, rv);
		ans = min(ans, lv + rv - d);
	}
	cout << (ans == LLINF ? -1 : ans);
}

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