oj.uz

Submission #949908

# Submission time Handle Problem Language Result Execution time Memory
949908 2024-03-19T22:00:49 Z starchan Semiexpress (JOI17_semiexpress) C++17
100 / 100
 74 ms 92948 KB 
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define in pair<int, int>
#define f first
#define s second
#define pb push_back
#define pob pop_back
#define INF (int)1e17
#define MX (int)3e5+5
const int SMX = 3e3+5;
#define fast() ios_base::sync_with_stdio(false); cin.tie(NULL)
int dp[SMX][SMX];
int cost[SMX][SMX];
void dnc(int k, int l, int r, int L, int R)//answer for all l, r lies between L and R.
{
	if(l > r)
		return;
	int m = (l+r)/2;
	in bet = {-INF, -INF};
	for(int opt = L; opt <= min(R, m); opt++)
		bet = max(bet, {dp[k-1][m-opt]+cost[k][opt], opt});
	dp[k][m] = bet.f; int opt = bet.s;
	dnc(k, l, m-1, L, opt);
	dnc(k, m+1, r, opt, R);
	return;
}
signed main()
{
	fast();
	int n, m, k, a, b, c, T;
	cin >> n >> m >> k >> a >> b >> c >> T;
	vector<int> v;
	v.pb(0);
	for(int i = 1; i <= m; i++)
	{
		int x; cin >> x;
		v.pb(x);
	}
	v.pb(n+1);
	for(int i = 1; i <= m; i++)
	{
		int t = b*(v[i]-1);
		int loc = v[i];
		if(t > T)
			break;
		int prev = 0;
		for(int n = 0; n <= k; n++)
		{
			if(loc >= v[i+1])
			{
				cost[i][n] = prev;
				continue;
			}
			if(t > T)
			{
				cost[i][n] = prev;
				continue;
			}
			int ell = (T-t)/a;
			//t, t+a, t+2a, .., t + ell a
			//loc, loc+1, .., loc + ell
			ell = min(ell, v[i+1]-1-loc);
			cost[i][n] = prev + (ell+1);
			t+=((ell+1)*c);
			loc+=(ell+1);
			prev = cost[i][n];
		}
	}
	/*for(int i = 1; i <= m; i++)
	{
		printf("For the %dth gap between %d and %d: ", i, v[i], v[i+1]);
		cout << "\n";
		for(int j = 0; j <= k; j++)
			cout << cost[i][j] << " ";
		cout << endl;
	}*/
	for(int i = 1; i <= m; i++)
	{
		dnc(i, 0, k, 0, k);

		/*for(int j = 0; j <= k; j++)
		{
			in ok = {-INF, -INF};
			for(int r = 0; r <= j; r++)
				ok = max(ok, {dp[i-1][j-r]+cost[i][r], r});
			dp[i][j] = ok.f;
			//cout << "r: " << ok.s << " j-r : " << j-ok.s << endl;
		}*/
		//cout << "----------------" << endl;
	}
	cout << dp[m][k-m]-1;
	return 0;
}

Subtask #1
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 4700 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2652 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 4700 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2652 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 1 ms 604 KB Output is correct
13 Correct 1 ms 2652 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2652 KB Output is correct
17 Correct 0 ms 604 KB Output is correct
18 Correct 1 ms 2652 KB Output is correct

Subtask #3
52.0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 4700 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2652 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 1 ms 604 KB Output is correct
13 Correct 1 ms 2652 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2652 KB Output is correct
17 Correct 0 ms 604 KB Output is correct
18 Correct 1 ms 2652 KB Output is correct
19 Correct 59 ms 42656 KB Output is correct
20 Correct 43 ms 40784 KB Output is correct
21 Correct 25 ms 36180 KB Output is correct
22 Correct 41 ms 44624 KB Output is correct
23 Correct 74 ms 81748 KB Output is correct
24 Correct 29 ms 58780 KB Output is correct
25 Correct 17 ms 23896 KB Output is correct
26 Correct 59 ms 92948 KB Output is correct
27 Correct 47 ms 73248 KB Output is correct
28 Correct 51 ms 75344 KB Output is correct
29 Correct 16 ms 25944 KB Output is correct
30 Correct 6 ms 7772 KB Output is correct