Submission #923776

#	Time	Username	Problem	Language	Result	Execution time	Memory
923776		Amr	Let's Win the Election (JOI22_ho_t3)	C++14	10 / 100	1 ms	2396 KiB

Main

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
#define S second
#define F first
#define all(x) (x).begin(),(x).end()
#define sz size()
#define Yes cout << "YES" << endl
#define No cout << "NO" << endl
#define pb(x) push_back(x);
#define endl '\n'
#define fast ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
const int N=3e5+7;
ll INF=INT_MAX,mod=1e9+7;
int TT=1;
ll power(ll x, unsigned int y)
{
    ll res = 1;
    x = x; // % mod;
    if (x == 0) return 0;
    while (y > 0)
    {
        if (y & 1) res = (res*x)  ; // % mod;
        y = y>>1;
        x = (x*x) ; // % mod;
    }
    return res;
}
vector<ld> v1,v2;
ll n ,k;
pair<ll,ll> a[N];
ld pre[N];
void solve()
{
    cin >> n >> k;
    for(int i = 1; i <= n ;i++) cin >> a[i].F >> a[i].S;
    for(int i = 1; i <= n; i++)
    {
        if(a[i].S==-1) {v2.push_back(a[i].F);}
        else v1.push_back(a[i].F);
    }
    sort(all(v1));
    sort(all(v2));
    for(int i = 1; i <= v2.sz; i++)
    {
        pre[i] = pre[i-1] + v2[i-1];
    }
    ld best = 1e18;
  //  cout << pre[k] << endl;
    ld sumfornow = 0;
    for(int i = 0; i <= v1.sz; i++)
    {
        if(k<i) break;
        if(i!=0)
        {
            sumfornow+=ld(v1[i-1]/i/1.0);
        }
        if(k-i>v2.sz) continue;
        ld x = sumfornow + pre[k-i]/(i+1);
        //cout << sumfornow << " " << x << endl;
        best = min(best,x);
    }
    cout << fixed << setprecision(15)<< best << endl;
}
int main(){
    //freopen("friday.in","r",stdin);
    //freopen("friday.out","w",stdout);
    fast;
    while(TT--)
        solve();

    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'void solve()':
Main.cpp:45:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long double>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |     for(int i = 1; i <= v2.sz; i++)
      |                      ^
Main.cpp:52:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long double>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |     for(int i = 0; i <= v1.sz; i++)
      |                      ^
Main.cpp:59:15: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long double>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   59 |         if(k-i>v2.sz) continue;
      |               ^

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