Submission #821649

#	Time	Username	Problem	Language	Result	Execution time	Memory
821649		AdamGS	Long Distance Coach (JOI17_coach)	C++17	0 / 100	1 ms	340 KiB

coach

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef struct item * pitem;
#define rep(a, b) for(ll a = 0; a < (b); ++a)
#define st first
#define nd second
#define pb push_back
#define all(a) a.begin(), a.end()
const ll INF=1e18+7;
const int LIM=2e5+7;
struct item {
	pitem l=nullptr, r=nullptr;
	ll a=0, b=INF;
};
ll T[LIM], dp[LIM], kiedy[LIM], pref[LIM], x, n, m, w, t, N=1;
pair<ll,ll>P[LIM];
ll ile(ll a, ll b, ll x) {
	if(x==0 || a==0) return b;
	if(a<0 && x<0) {
		a*=-1; x*=-1;
	}
	if(a<0 || x<0) {
		a=abs(a); x=abs(x);
		if(INF/a<x) return -INF;
		a*=-1;
	} else {
		if(INF/a<x) return INF;
	}
	a*=x; a+=b;
	a=max(a, -INF);
	a=min(a, INF);
	return a;
}
void upd(pitem &v, ll l, ll r, ll a, ll b) {
	if(l==r) {
		if(ile(v->a, v->b, l)>ile(a, b, l)) {
			v->a=a;
			v->b=b;
			return;
		}
	}
	if(a==0 && b==INF) return;
	ll mid=(l+r-1)/2;
	if(ile(v->a, v->b, mid)>ile(a, b, mid)) {
		swap(v->a, a);
		swap(v->b, b);
	}
	if(a<v->a) {
		if(!v->r) v->r=new item();
		upd(v->r, mid+1, r, a, b);
	} else {
		if(!v->l) v->l=new item();
		upd(v->l, l, mid, a, b);
	}
}
ll cnt(pitem &v, ll l, ll r, ll x) {
	if(!v) return INF;
	ll ans=ile(v->a, v->b, x), mid=(l+r-1)/2;
	if(l==r) return ans;
	if(x<=mid) ans=min(ans, cnt(v->l, l, mid, x));
	else ans=min(ans, cnt(v->r, mid+1, r, x));
	return ans;
}
int main() {
	ios_base::sync_with_stdio(0); cin.tie(0);
	cin >> x >> n >> m >> w >> t;
	rep(i, 40) N*=2;
	pitem root=new item();
	rep(i, n) cin >> T[i];
	T[n]=x; ++n;
	rep(i, m) cin >> P[i].st >> P[i].nd;
	sort(T, T+n);
	sort(P, P+m);
	rep(i, m) {
		kiedy[i]=INF;
		pref[i]=P[i].nd;
		if(i) pref[i]+=pref[i-1];
	}
	rep(i, n) {
		ll po=0, ko=m-1;
		while(po<ko) {
			ll sr=(po+ko+1)/2;
			if(P[sr].st>T[i]%t) ko=sr-1; else po=sr;
		}
		if(P[po].st>T[i]%t) continue;
		kiedy[po]=min(kiedy[po], T[i]/t);
	}
	rep(i, m) {
		ll ile=w*(x/t);
		if(x%t>P[i].st) ile+=w;
		dp[i]=ile;
		if(i) dp[i]+=dp[i-1];
		if(kiedy[i]!=INF) {
			dp[i]=min(dp[i], pref[i]+i*kiedy[i]*w+cnt(root, -N+1, 0, -kiedy[i]));
			dp[i]=min(dp[i], pref[i]+(i+1)*kiedy[i]*w);
		}
		upd(root, -N+1, 0, i*w, dp[i]-pref[i]);
	}
	cout << dp[m-1]+w*(x/t+1) << '\n';
}

• Subtask 1: 0 / 16
• Subtask 2: 0 / 30
• Subtask 3: 0 / 25
• Subtask 4: 0 / 29