Submission #995704

#	Time	Username	Problem	Language	Result	Execution time	Memory
995704		mnieplowicz	Self Study (JOI22_ho_t2)	C++14	100 / 100	90 ms	10512 KiB

Main

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

int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	
	long long n, m;
	cin >> n >> m;
	vector<long long> a(n);
	for(auto &x : a) cin >> x;
	vector<long long> b(n);
	for(auto &x : b) cin >> x;
	for(int i = 0; i < n; i++) a[i] = max(a[i], b[i]);
	
	auto check = [&](long long val){
		unsigned long long cnt = 0;
		for(int i = 0; i < n; i++){
			if(a[i]*m >= val) cnt += ((val - 1)/a[i] + 1);
			else cnt += (m + (val - m*a[i] -1)/b[i] + 1);
		}
		if(cnt <= m*n) return true;
		else return false;
	};
	
	long long l = 0, r = 2e18;
	while(l+1 != r){
		long long mid = (l+r)/2;
		if(check(mid)) l = mid;
		else r = mid;
	}
	cout << l << '\n';
	return 0;
}

Compilation message (stderr)

Main.cpp: In lambda function:
Main.cpp:22:10: warning: comparison of integer expressions of different signedness: 'long long unsigned int' and 'long long int' [-Wsign-compare]
   22 |   if(cnt <= m*n) return true;
      |      ~~~~^~~~~~

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