Submission #302380

#	Time	Username	Problem	Language	Result	Execution time	Memory
302380		ElyesChaabouni	Hiring (IOI09_hiring)	C++14	100 / 100	828 ms	17116 KiB

hiring

#include <bits/stdc++.h>
#define MOD 998244353

using namespace std;

bool compare(pair<pair<long long, long long>, int>a, pair<pair<long long, long long>, int>b)
{
	if(a.first.first*b.first.second != a.first.second*b.first.first)
		return a.first.first*b.first.second < a.first.second*b.first.first;
	return a.first.first < b.first.first;
}
int main()
{
	//freopen("input.txt", "r", stdin);
	//freopen("output.txt", "w", stdout);
	long long n, w;
	cin >> n >> w;
	vector<pair<pair<long long, long long>, int> >v;
	for(int i = 0; i < n; i++)
	{
		int x, y;
		cin >> x >> y;
		v.push_back(make_pair(make_pair(x, y), i));
	}
	sort(v.begin(), v.end(), compare);
	priority_queue<pair<int, int> >pq;
	long long sum=0;
	long long ma=0, idx=0, ma_v_s=0, ma_v_q=0;
	for(int i = 0; i < n; i++)
	{
		sum+=v[i].first.second;
		pq.push(make_pair(v[i].first.second, v[i].second));
		while(sum*v[i].first.first > w*v[i].first.second && !pq.empty())
		{
			sum-=pq.top().first;
			pq.pop();
		}
		if(pq.size() > ma)
		{
			ma=pq.size();
			idx=i;
			ma_v_s=v[i].first.first*sum;
			ma_v_q=v[i].first.second;
		}
		else if(pq.size() == ma && ma_v_s*v[i].first.second > ma_v_q*v[i].first.first*sum)
		{
			idx=i;
			ma_v_s=v[i].first.first*sum;
			ma_v_q=v[i].first.second;
		}
	}
	while(!pq.empty())
		pq.pop();
	sum=0;
	for(int i = 0; i <= idx; i++)
	{
		sum+=v[i].first.second;
		pq.push(make_pair(v[i].first.second, v[i].second));
		while(sum*v[i].first.first > w*v[i].first.second && !pq.empty())
		{
			sum-=pq.top().first;
			pq.pop();
		}
	}
	cout << ma;
	while(!pq.empty())
	{
		cout << '\n' << pq.top().second+1;
		pq.pop();
	}
}

Compilation message (stderr)

hiring.cpp: In function 'int main()':
hiring.cpp:38:16: warning: comparison of integer expressions of different signedness: 'std::priority_queue<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   38 |   if(pq.size() > ma)
      |      ~~~~~~~~~~^~~~
hiring.cpp:45:21: warning: comparison of integer expressions of different signedness: 'std::priority_queue<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   45 |   else if(pq.size() == ma && ma_v_s*v[i].first.second > ma_v_q*v[i].first.first*sum)
      |           ~~~~~~~~~~^~~~~

• Subtask 1: 30 / 30
• Subtask 2: 28 / 28
• Subtask 3: 6 / 6
• Subtask 4: 6 / 6
• Subtask 5: 6 / 6
• Subtask 6: 6 / 6
• Subtask 7: 6 / 6
• Subtask 8: 6 / 6
• Subtask 9: 6 / 6