Submission #538743

#	Time	Username	Problem	Language	Result	Execution time	Memory
538743		fabijan_cikac	Hiring (IOI09_hiring)	C++17	100 / 100	1339 ms	60044 KiB

hiring

#include <bits/stdc++.h>

using namespace std;

#define F first
#define S second
#define db double
#define pp pair<db, db>
#define ppp pair<db, pp>

int n; db w;
vector<db> sk;
vector<db> q;
vector<pair<db, int> > v;
multiset<db> s; int siz = 0;
map<db, multiset<pp> > mp;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    cin >> n >> w;
    sk.resize(n); q.resize(n);
    for (int i = 0; i < n; ++i){
        cin >> sk[i] >> q[i]; mp[q[i]].insert({sk[i], i + 1});
        v.push_back({sk[i] / q[i], i});
    }
    sort(v.begin(), v.end()); db sum = 0;
    db mini = 1e10;
    for (int i = 0; i < n; ++i){
        db val = q[v[i].S];
        s.insert(val); sum += val;
        while (!s.empty() && sum * v[i].F > w){
            auto it = s.end(); --it;
            sum -= (*it); s.erase(it);
        }
        if (siz < s.size())
            mini = sum * v[i].F;
        else if (siz == s.size())
            mini = min(mini, sum * v[i].F);
        siz = max(siz, (int)(s.size()));
    }
    cout << siz << '\n'; s.clear(); sum = 0;
    for (int i = 0; i < n; ++i){
        db val = q[v[i].S];
        s.insert(val); sum += val;
        while (!s.empty() && sum * v[i].F > w){
            auto it = s.end(); --it;
            sum -= (*it); s.erase(it);
        }
        if (siz == (int)(s.size()) && mini == sum * v[i].F){
            while (!s.empty()){
                auto it = s.begin(); db x = (*it); s.erase(it);
                auto it2 = mp[x].begin();
                cout << (*it2).S << '\n'; mp[x].erase(it2);
            }
            break;
        }
    }

    return 0;
}

Compilation message (stderr)

hiring.cpp: In function 'int main()':
hiring.cpp:37:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::multiset<double>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |         if (siz < s.size())
      |             ~~~~^~~~~~~~~~
hiring.cpp:39:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::multiset<double>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |         else if (siz == s.size())
      |                  ~~~~^~~~~~~~~~~

• 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