Submission #623024

#	Time	Username	Problem	Language	Result	Execution time	Memory
623024		sofapuden	Hiring (IOI09_hiring)	C++14	100 / 100	671 ms	39288 KiB

hiring

#include<bits/stdc++.h>

using namespace std;

typedef long long ll;

struct T{
	ll a, b, i;
};

bool cmp(T a, T b){
	return a.a*b.b < b.a*a.b;
}

void solve(){
	ll n, w; cin >> n >> w;
	vector<T> A(n);
	for(int i = 0; i < n; ++i)cin >> A[i].a >> A[i].b, A[i].i = i+1;
	sort(A.begin(),A.end(),cmp);
	vector<pair<ll,ll>> v(n);
	for(int i = 0; i < n; ++i)v[i] = {A[i].a,A[i].b};
	ll su = 0;
	ll cn = 0;
	pair<ll,ll> mn = {0,0};
	multiset<ll> cur;
	set<pair<ll,ll>> in;
	for(int i = 0; i < n; ++i){
		su+=v[i].second;
		cur.insert(v[i].second);
		while(su*v[i].first > w * v[i].second){
			su-=*prev(cur.end());
			cur.erase(prev(cur.end()));
		}
		if(cn == cur.size()){
			if(mn.first*v[i].second > su*v[i].first*mn.second){
				mn = {su*v[i].first,v[i].second};
			}
		}
		if(cn < cur.size()){
			cn = cur.size();
			mn = {su*v[i].first,v[i].second};
		}
	}
	cout << cn << '\n';
	su = 0;
	for(int i = 0; i < n; ++i){
		su+=v[i].second;
		in.insert({v[i].second,i});
		while(su*v[i].first > w * v[i].second){
			su-=prev(in.end())->first;
			in.erase(prev(in.end()));
		}
		if(in.size() == cn && mn == make_pair(su*v[i].first,v[i].second)){
			for(auto x : in)cout << A[x.second].i << '\n';
			return;
		}
	}
}

int main(){
	solve();
}

Compilation message (stderr)

hiring.cpp: In function 'void solve()':
hiring.cpp:34:9: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::multiset<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |   if(cn == cur.size()){
      |      ~~~^~~~~~~~~~~~~
hiring.cpp:39:9: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::multiset<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |   if(cn < cur.size()){
      |      ~~~^~~~~~~~~~~~
hiring.cpp:53:16: warning: comparison of integer expressions of different signedness: 'std::set<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   53 |   if(in.size() == cn && mn == make_pair(su*v[i].first,v[i].second)){
      |      ~~~~~~~~~~^~~~~

• 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