Submission #733690

#	Time	Username	Problem	Language	Result	Execution time	Memory
733690		penguin133	Hiring (IOI09_hiring)	C++17	52 / 100	1581 ms	18120 KiB

hiring

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

#define int long long
#define pi pair<int, int>
#define pii pair<int, pi>
#define fi first
#define se second
#ifdef _WIN32
#define getchar_unlocked _getchar_nolock
#endif
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

int n, w;
pii A[500005];

bool cmp(pii a, pii b){
	return ((long double)a.fi / (long double)a.se.fi) < ((long double)b.fi / (long double)b.se.fi);
}

void solve(){
	cin >> n >> w;
	for(int i=1;i<=n;i++)cin >> A[i].fi >> A[i].se.fi, A[i].se.se = i;
	sort(A+1, A+n+1, cmp);
	vector <pi> v;
	pair<int, long double> ans = {0, 0.0L};
	vector <int> fin;
	for(int i=1;i<=n;i++){
		int x = w * A[i].se.fi / A[i].fi;
		x -= A[i].se.fi;
		vector <int> tmp = {A[i].se.se};
		for(auto [j, k] : v){
			if(x >= j)x -= j, tmp.push_back(k);
		}
		v.push_back({A[i].se.fi, A[i].se.se});
		sort(v.begin(), v.end());
		int used = w * A[i].se.fi / A[i].fi - x;
		long double brub = (long double)(used * A[i].fi) / A[i].se.fi;
		if((int)tmp.size() > ans.fi || ((int)tmp.size() == ans.fi && ans.se < -brub))ans = {(int)tmp.size(), -brub}, fin = tmp;
	}
	cout << fin.size() << '\n';
	for(auto i : fin)cout << i << '\n';
}

main(){
	ios::sync_with_stdio(0);cin.tie(0);
	int tc = 1;
	//cin >> tc;
	for(int tc1=1;tc1<=tc;tc1++){
		// cout << "Case #" << tc1 << ": ";
		solve();
	}
}

Compilation message (stderr)

hiring.cpp:45:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   45 | main(){
      | ^~~~

• Subtask 1: 22 / 30
• Subtask 2: 12 / 28
• Subtask 3: 6 / 6
• Subtask 4: 6 / 6
• Subtask 5: 6 / 6
• Subtask 6: 0 / 6
• Subtask 7: 0 / 6
• Subtask 8: 0 / 6
• Subtask 9: 0 / 6