Submission #851747

#	Time	Username	Problem	Language	Result	Execution time	Memory
851747		Naser	Overtaking (IOI23_overtaking)	C++17	65 / 100	3526 ms	25688 KiB

overtaking

#include <bits/stdc++.h>
//#define int long long
#define ll long long
#define endl '\n'
#define pii pair<int,int>
#define vint vector<int>
#define vll vector<ll>
#define vpii vector<pii>
#define pb push_back
#define se second
#define fi first
#define all(x) x.begin(), x.end()
#define graph vector<vll>
using namespace std;
const int N = (int)2e5 + 69;
const int mod = (int)1e4 + 7;
const int naser = 3999, tourist = 3816;
int power(int a, int b) { int ans = 1; while (b) { if (b % 2) ans *= a; a *= a; b /= 2; } return ans; }
 
ll n, x, m, l, y, stn;
vll w, s, t;
graph arv, srt,arvsrt;
 
bool cmp(int a, int b) {
	if (arv[stn][a] == arv[stn][b])
		return w[a] < w[b];
	return arv[stn][a] < arv[stn][b];
}
bool cmp2(int a, int b) {
	return arv[stn][a] < b;
}
void init(int L, int N, vll T, vint W, int X, int M, vint S) {
	n = N;
	t = T;
	w.resize(n);
	for (int i = 0; i < n; i++)
		w[i] = W[i];
	x = X;
	m = M;
	s.resize(m);
	for (int i = 0; i < m; i++)
		s[i] = S[i];
	arv.resize(m, vll(n));
	srt.resize(m, vll(n));
	arvsrt.resize(m);
	vector<ll> tmp;
	for (int i = 0; i < n; i++) {
		arv[0][i] = t[i];
		arvsrt[0].pb(t[i]);
		tmp.pb(i);
	}
	sort(all(arvsrt[0]));
 
	for (int i = 0; i < m - 1; i++) {
		stn = i;
		sort(all(tmp), cmp);
		srt[i] = tmp;
 
		arv[i + 1][srt[i][0]] = arvsrt[i][0] + w[srt[i][0]] * (s[i + 1] - s[i]);
		arvsrt[i + 1].pb(arvsrt[i][0] + w[srt[i][0]] * (s[i + 1] - s[i]));
		for (int j = 1; j < n; j++) {
			int bus = srt[i][j];
			int prv = srt[i][j - 1];
			ll ex = arv[i][bus] + (s[i + 1] - s[i]) * w[bus];
			if (ex > arv[i + 1][prv])
				arv[i + 1][bus] = ex;
			else
				arv[i + 1][bus] = arv[i + 1][prv];
			arvsrt[i + 1].pb(arv[i + 1][bus]);
		}
 
	}
}
 
long long arrival_time(long long y) {
	ll ans = y;
	for (int i = 0; i < m - 1; i++) {
		ll ex = ans + (s[i+1] - s[i]) * x;
		if (ans <= arvsrt[i][0])
			ans = ex;
		else {
			int idx = lower_bound(all(arvsrt[i]),ans)-arvsrt[i].begin();
			int prv = srt[i][idx - 1];
			if (ex < arv[i+1][prv])
				ans = arv[i+1][prv];
			else
				ans = ex;
		}
	}
	return ans;
}
//int32_t main() {
//
//	init(6, 4, { 20, 10, 40, 0 }, { 5, 20, 20, 30 }, 10, 4, { 0, 1, 3, 6 });
//	//init(6, 1, { 5 }, { 20 }, 10, 5, { 0,2,4,5 ,6 });
//	while (naser > tourist) {
//		ll Y;
//		cin >> Y;
//		cout << arrival_time(Y) << endl;
//	}
//
//}

• Subtask 0: 0 / 0
• Subtask 1: 9 / 9
• Subtask 2: 10 / 10
• Subtask 3: 20 / 20
• Subtask 4: 26 / 26
• Subtask 5: 0 / 35