Submission #937323

#	Time	Username	Problem	Language	Result	Execution time	Memory
937323		Maite_Morale	Let's Win the Election (JOI22_ho_t3)	C++14	11 / 100	1 ms	4444 KiB

Main

#include<bits/stdc++.h>
#define F first
#define S second
#define MAX 105
#define oo 1e9+7
#define mod 1000000007
#define fast_in ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);cout.setf(ios::fixed);cout.precision(3);
using namespace std;
typedef long long ll;
typedef long double db;
#define pll pair<ll , ll>
#define vll vector<ll>
#define vvll vector<vll>
#define vpll vector<pll>
 
ll t,n,mn[MAX],m,l[MAX];
pll aux[MAX];
db dp[MAX][MAX][MAX],cost[MAX];
pair<db,db> a[MAX];
int main(){
    fast_in
    cin>>n>>m;t=n;
    for(int i=0;i<n;i++){
        cin>>a[i].S>>a[i].F;
        if(a[i].F==-1){a[i].F=oo;t--;}
        aux[i]={a[i].S,a[i].F};
        mn[i]=a[i].S;
    }
    sort(a,a+n);sort(mn,mn+n);sort(aux,aux+n);
    ll s=0,top=m-1;
    for(int i=0;i<n;i++){
        aux[i]={aux[i].S,i};
        if(i<m)s+=mn[i];
        l[i]=i;
    }sort(aux,aux+n);
    for(int i=0;i<m;i++){
       cost[i]=s;
       if(aux[i].S<top){
          s-=mn[aux[i].S];
          if(aux[i].S>0)l[aux[i].S]=l[aux[i].S-1];
       }
       else{
          s-=mn[top];top=l[top-1];
       }
    }
    db r=cost[0];
    cost[m]=s;
    for(int k=0;k<=min(t,m);k++){
        for(int j=0;j<=k;j++){
            for(int i=0;i+k<=m;i++){
                dp[i][j][k]=oo;
                if(i+j==0)dp[i][j][k]=0;
                if(i>0)dp[i][j][k]=min(dp[i][j][k],dp[i-1][j][k]+a[i+j-1].S/(k+1));
                if(j>0)dp[i][j][k]=min(dp[i][j][k],dp[i][j-1][k]+a[i+j-1].F/j);
              //  if(i>0)cout<<dp[i-1][j][k]<<"+"<<a[i+j-1].S/k<<".\n";
              //  if(j>0)cout<<dp[i][j-1][k]<<"+"<<a[i+j-1].F/j<<"'\n";
                if(j==k){
                //    cout<<i<<" "<<k<<" "<<" "<<dp[i][k][k]<<"+"<<cost[i+k]<<"\n";
                    if(cost[i+k]==0)r=min(r,dp[i][j][k]);
                    else            r=min(r,dp[i][j][k]+cost[i+k]/(k+1));
                }
            }
        }
    }
    cout<<r;
return 0;
}

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