oj.uz

Submission #585785

# Submission time Handle Problem Language Result Execution time Memory
585785 2022-06-29T10:46:37 Z Drew_ Let's Win the Election (JOI22_ho_t3) C++17
0 / 100
 2222 ms 316 KB 
#include <bits/stdc++.h>
using namespace std;

#define pb push_back
#define mp make_pair
#define f1 first
#define s2 second

#define fastio ios :: sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define debug(x) cerr << "[" << #x << "]: " << x << "\n";

using ll = long long;
using ld = long double;
using ii = pair<int, int>;
using pl = pair<ll, ll>;

constexpr ld PI = 4*atan((ld)1);
constexpr int MAX = 569;

int n, k;
ii a[MAX];

bool check(ld val)
{
	int res = 0;
	ld pfx = 0, all = val;
	for (int i = -1; i < n; ++i) //the number of delegation
	{
		int ctr = i+1;

		if (i != -1)
		{
			if (all < a[i].s2 || a[i].s2 == -1)
				break;
			all -= a[i].s2;

			pfx += (ld)a[i].s2 / (i+1);
			all += val - pfx;
		}

		// debug(i);
		// debug(all);

		vector<int> v;
		for (int j = i+1; j < n; ++j)
			v.pb(a[j].f1);
		sort(v.begin(), v.end());

		// cerr << "v: ";
		// for (int x : v)
		// 	cerr << x << ", ";
		// cerr << '\n';

		ld rem = all;
		for (int x : v)
			if (rem >= x)
				rem -= x, ctr++;

		res = max(res, ctr);

		// debug(ctr);
	}
	// cerr << res << '\n';

	return res >= k;
}

ld kn()
{
	sort(a, a+n, [](const ii &x, const ii &y){
		return (x.s2 == -1 ? 6969 : x.s2) < (y.s2 == -1 ? 6969 : y.s2);
	});

	ld res = 1e18;
	for (int i = -1; i < n; ++i)
	{
		if (i != -1 && a[i].s2 == -1)
			break;

		ld ctr = 0;
		for (int j = 0; j <= i; ++j)
			ctr += (double)a[j].s2 / (j+1);

		for (int j = i+1; j < n; ++j)
			ctr += (double)a[j].f1 / (i+2);
		res = min(res, ctr);
	}
	return res;
}

int main()
{
	fastio;

	cin >> n >> k;
	for (int i = 0; i < n; ++i)
		cin >> a[i].f1 >> a[i].s2;
	sort(a, a+n, [](const ii &x, const ii &y){
		return (x.s2 == -1 ? 6969 : x.s2) < (y.s2 == -1 ? 6969 : y.s2); 
	});

	// check(11);
	// return 0;

	ld l = 0, r = 500000;
	for (int i = 0; i < 500; ++i)
	{
		ld mid = (l + r) / 2;
		if (check(mid)) r = mid;
		else l = mid;
	}
	cout << fixed << setprecision(15) << l << '\n';
	cout << fixed << setprecision(15) << kn() << '\n';

	return 0;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 2222 ms 316 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -