Submission #1086218

#	Time	Username	Problem	Language	Result	Execution time	Memory
1086218		I_am_Polish_Girl	Self Study (JOI22_ho_t2)	C++14	100 / 100	89 ms	11344 KiB

Main

//#pragma target("arch=icelake-server")

#include <iostream>
#include <vector>
#include <algorithm>
#include <map>
#include <set>
#include <unordered_map>
#include <unordered_set>
#include <stack> 
#include <queue>
#include <cmath>
#include <random>
#include <chrono>
#include <iomanip>
#include <bitset>

using namespace std;

#define int long long

typedef long long ll;
typedef long double ld;

int log_ = 11;
int inf = 1000000007;

long long mod = 1000000007;

int p = 499;

int NADIYA = 39;

signed main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);
	
	int n, m;
	cin >> n >> m;

	vector <int> a(n);
	vector <int> b(n);

	for (int i = 0; i < n; i++)
		cin >> a[i];

	for (int i = 0; i < n; i++)
		cin >> b[i];

	for (int i = 0; i < n; i++)
	{
		a[i] = max(a[i], b[i]);
	}


	int l = 0;
	int r = inf;

	for (int i = 0; i < n; i++)
	{
		r = max(r, a[i] * m);
	}

	r+= 10;

	while (r - l > 1)
	{
		int mx = (l + r) / 2;


		int c = 0;

		for (int i = 0; i < n; i++)
		{
			if (mx <= a[i] * m)
			{
				int x = ((mx) / a[i]) + ((mx % a[i]) > 0);
				c += (m - x);

			}
			else
			{
				int x = mx - a[i] * m;

				int y = ((x) / b[i]) + ((x % b[i]) > 0);
				c -= y;

				if (c < -(n - i - 1) * m)
					break;
			}
		}

		if (c >= 0)
			l = mx;
		else
			r = mx;
	}

	cout << l;
}

/*5
1 2 1
2 3 1
2 4 1
1 5 4
*/

• Subtask 1: 10 / 10
• Subtask 2: 25 / 25
• Subtask 3: 27 / 27
• Subtask 4: 29 / 29
• Subtask 5: 9 / 9