Submission #991637

#	Time	Username	Problem	Language	Result	Execution time	Memory
991637		Otalp	Let's Win the Election (JOI22_ho_t3)	C++14	5 / 100	2585 ms	4792 KiB

Main

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define int ll
#define pii pair<int, int>
#define ff first
#define ss second
#define ld long double
#define pb push_back

pair<ld, ld> a[300100];
ll b[300100];
ll n, m;
ll us[200100];


bool cmp(int x, int y){
    return a[x].ss < a[y].ss;
}

void solve(){
    cin>>n>>m;
    int cnt = 0;
    vector<int> q;
    for(int i=1; i<=n; i++){
        cin>>a[i].ff>>a[i].ss;
        if(a[i].ss == -1) a[i].ss = 1e9;
        else cnt ++, q.pb(i);
    }
    sort(a + 1, a + 1 + n);
    ld ans = 1e18;
    for(int k=0; k<(1 << n); k++){
        ld res = 0;
        vector<int> q;
        for(int i=0; i<n; i++){
            us[i + 1] = 0;
            if((k & (1 << i))){
                q.pb(i + 1);
                if(a[i + 1].ss == 1e9) res = -1;
            }
        }
        if(res == -1) continue;
        sort(q.begin(), q.end());
        for(int i=0; i<q.size(); i++){
            us[q[i]] = 1;
            res += a[q[i]].ss / (i + 1);
        }
        int cnt = q.size();
        for(int i=1; i<=n; i++){
            if(cnt >= m) break;
            if(us[i]) continue;
            us[i] = 1;
            res += a[i].ff / (q.size() + 1);
            cnt ++;
        }
        ans = min(ans, res);
    }
    cout<<fixed<<setprecision(9)<<ans<<'\n';
}


signed main(){
    solve();
}

Compilation message (stderr)

Main.cpp: In function 'void solve()':
Main.cpp:44:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |         for(int i=0; i<q.size(); i++){
      |                      ~^~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 5
• Subtask 3: 0 / 11
• Subtask 4: 0 / 12
• Subtask 5: 0 / 33
• Subtask 6: 0 / 11
• Subtask 7: 0 / 23