Submission #527683

#	Time	Username	Problem	Language	Result	Execution time	Memory
527683		8e7	Self Study (JOI22_ho_t2)	C++17	100 / 100	236 ms	9552 KiB

Main

//Challenge: Accepted
#include <bits/stdc++.h>
using namespace std;
#ifdef zisk
void debug(){cout << endl;}
template<class T, class ... U> void debug(T a, U ... b){cout << a << " ", debug(b...);}
template<class T> void pary(T l, T r) {
	while (l != r) cout << *l << " ", l++;
	cout << endl;
}
#else
#define debug(...) 0
#define pary(...) 0
#endif
#define ll long long
#define maxn 300005
#define pii pair<int, int>
#define ff first
#define ss second
#define io ios_base::sync_with_stdio(0);cin.tie(0);
ll a[maxn], b[maxn];
int main() {
	io
	ll n, m;
	cin >> n >> m;
	for (int i = 0;i < n;i++) cin >> a[i];
	for (int i = 0;i < n;i++) cin >> b[i];
	ll low = 0, up = 1LL<<60;
	while (low < up - 1) {
		ll mid = (low + up) / 2, cnt = 0;
		for (int i = 0;i < n;i++) {
			if (b[i] >= a[i]) cnt += (mid + b[i] - 1) / b[i];
			else {
				if (mid > m * a[i]) cnt += m + (mid - m*a[i] + b[i] - 1) / b[i];
				else cnt += (mid + a[i] - 1) / a[i];
			}
			if (cnt > n * m) break;
		}
		if (cnt > n * m) up = mid;
		else low = mid;
	}
	cout << low << endl;
	
}

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