Submission #440253

#	Time	Username	Problem	Language	Result	Execution time	Memory
440253		aryan12	Semiexpress (JOI17_semiexpress)	C++17	18 / 100	1 ms	204 KiB

semiexpress

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

mt19937_64 RNG(chrono::steady_clock::now().time_since_epoch().count());

void Solve() {
	int n, m, k;
	cin >> n >> m >> k;
	int a, b, c;
	cin >> a >> b >> c;
	int maxTim;
	cin >> maxTim;
	int express[m + 1];
	for(int i = 1; i <= m; i++) {
		cin >> express[i];
	}
	int curAns = 0;
	vector<int> ans;
	for(int i = 1; i < m; i++) {
		int timetoreachhere = (express[i] - 1) * b;
		int timeleft = maxTim - timetoreachhere;
		if(timeleft < 0) {
			continue;
		}
		//cout << "timeleft = " << timeleft << "\n";
		curAns += min((timeleft / a) + 1, express[i + 1] - express[i]);
		//cout << "curAns = " << curAns << "\n";
		if((timeleft / a) + 1 >= express[i + 1] - express[i]) {
			//cout << "curAns = " << curAns << "\n";
			continue;
		}
		int starting = express[i] + timeleft / a + 1;
		int cnt = 0;
		while(starting < express[i + 1] && cnt <= k - m) {
			cnt++;
			int newtimeleft = timetoreachhere + c * (starting - express[i]);
			newtimeleft = maxTim - newtimeleft;
			if(newtimeleft < 0) {
				break;
			}
			int ending = min(starting + newtimeleft / a, express[i + 1]);
			if(ending == express[i + 1]) {
				//cout << "Pushing: " << ending - starting << "\n";
				ans.push_back(ending - starting);
			}
			else {
				//cout << "Pushing: " << ending - starting + 1 << "\n";
				ans.push_back(ending - starting + 1);
			}
			//cout << "i = " << i << "\n";
			//cout << "starting = " << starting << ", ending = " << ending << "\n";
			//cout << "time to reach here = " << timetoreachhere << ", newtimeleft = " << newtimeleft << "\n";
			starting = ending + 1;
		}
	}
	curAns--;
	if(b * (express[m] - 1) <= maxTim) {
		curAns++;
	}
	if(ans.size() != 0) {
		sort(ans.begin(), ans.end());
		reverse(ans.begin(), ans.end());
		for(int i = 0; i < k - m; i++) {
			curAns += ans[i];
		}
	}
	cout << curAns << "\n";
}

int32_t main() {
	auto begin = std::chrono::high_resolution_clock::now();
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	int t = 1;
	//cin >> t;
	while(t--) {
		Solve();
	}
	auto end = std::chrono::high_resolution_clock::now();
    auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin);
    cerr << "Time measured: " << elapsed.count() * 1e-9 << " seconds.\n"; 
}

• Subtask 1: 18 / 18
• Subtask 2: 0 / 30
• Subtask 3: 0 / 52