oj.uz

답안 #734576

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
734576 2023-05-02T16:33:51 Z 1075508020060209tc Let's Win the Election (JOI22_ho_t3) C++14
21 / 100
 1080 ms 4436 KB 
#include<bits/stdc++.h>
using namespace std;
//#define double long double
int n;int K;
int M;
pair<int,int>ar[200005];
double ans;

double dp[510][510];
int srtsf[510][510];
int srtps[510][510];
bool cmp(pair<int,int>i,pair<int,int>j){
if(i.second<j.second){return 1;}
if(i.second>j.second){return 0;}
if(i.first<j.first){return 1;}
return 0;
}

double solve(int m){

for(int i=0;i<=n;i++){
    for(int j=0;j<=n;j++){
        dp[i][j]=10000000;
    }
}

dp[1][0]=(double)ar[1].first/(double)(m+1);
dp[1][1]=ar[1].second;

for(int i=1;i<=n;i++){
    for(int j=0;j<=m;j++){
        if(dp[i][j]>5000000){continue;}
        dp[i+1][j]=min(dp[i+1][j],dp[i][j]+(double)ar[i+1].first/(double)(m+1));
        dp[i+1][j+1]=min(dp[i+1][j+1],dp[i][j]+(double)ar[i+1].second/(double)(j+1));
    }
}
double ret=dp[K][m];
//cout<<fixed<<setprecision(6)<<ret<<"  ";
for(int i=K-1;i>=m;i--){

    double v=0;
    vector<int>tv;
    for(int j=i+1;j<=n;j++){
        tv.push_back(ar[j].first);
    }
    sort(tv.begin(),tv.end());
    for(int j=0;j<K-i;j++){
        v+=tv[j];
    }v/=double(m+1);
    ret=min(ret,dp[i][m]+v);

   // ret=min(ret,dp[i][m]+(double)srtps[i+1][i+1+K-i-1]/(double)(m+1));
}
//cout<<fixed<<setprecision(6)<<ret<<endl;
return ret;
}


signed main(){
cin>>n>>K;
M=0;
for(int i=1;i<=n;i++){
    cin>>ar[i].first>>ar[i].second;
    if(ar[i].second==-1){
        ar[i].second=2000;
    }else{
        M++;
    }
}

sort(ar+1,ar+n+1,cmp);
/*
cout<<endl;
for(int i=1;i<=n;i++){
    cout<<ar[i].first<<" "<<ar[i].second<<endl;
}
cout<<endl;
*/
for(int i=1;i<=n;i++){

    for(int j=i;j<=n;j++){
        srtsf[i][j]=ar[j].first;
        //srtps[i][j]=srtsf[i][j]+srtps[i][j-1];
    }
    sort(srtsf[i]+i,srtsf[i]+n+1);
    for(int j=i;j<=n;j++){
        srtps[i][j]=srtsf[i][j]+srtps[i][j-1];
    }
}
/*
for(int i=1;i<=n;i++){

    for(int j=1;j<=n;j++){
        cout<<srtsf[i][j]<<" ";
    }cout<<endl;

}
*/



ans=5000000;
for(int i=0;i<=min(K,M);i++){
    ans=min(ans,solve(i));
}
cout<<fixed<<setprecision(6)<<ans<<endl;




/*


double l=0;double r=500000;
for(int ttt=0;ttt<90;ttt++){
    double mi=(l+r)/2;
    if(ok(mi)){
        l=mi;
    }else{
        r=mi;
    }
}

cout<<fixed<<setprecision(6)<<l<<endl;


*/

}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 6 ms 4308 KB Output is correct
6 Correct 5 ms 4308 KB Output is correct
7 Correct 5 ms 4308 KB Output is correct
8 Correct 6 ms 4244 KB Output is correct
9 Correct 6 ms 4308 KB Output is correct
10 Correct 5 ms 4320 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 6 ms 4308 KB Output is correct
6 Correct 5 ms 4308 KB Output is correct
7 Correct 5 ms 4308 KB Output is correct
8 Correct 6 ms 4244 KB Output is correct
9 Correct 6 ms 4308 KB Output is correct
10 Correct 5 ms 4320 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 108 ms 4308 KB Output is correct
13 Correct 159 ms 4308 KB Output is correct
14 Correct 113 ms 4308 KB Output is correct
15 Correct 354 ms 4300 KB Output is correct
16 Correct 458 ms 4308 KB Output is correct
17 Correct 185 ms 4308 KB Output is correct
18 Correct 533 ms 4308 KB Output is correct
19 Correct 511 ms 4308 KB Output is correct
20 Correct 189 ms 4308 KB Output is correct

Subtask #3
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1018 ms 4308 KB Output is correct
2 Correct 1002 ms 4308 KB Output is correct
3 Correct 1012 ms 4316 KB Output is correct
4 Correct 1080 ms 4308 KB Output is correct
5 Correct 1044 ms 4428 KB Output is correct
6 Correct 1020 ms 4308 KB Output is correct
7 Correct 857 ms 4436 KB Output is correct

Subtask #7
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 6 ms 4308 KB Output is correct
6 Correct 5 ms 4308 KB Output is correct
7 Correct 5 ms 4308 KB Output is correct
8 Correct 6 ms 4244 KB Output is correct
9 Correct 6 ms 4308 KB Output is correct
10 Correct 5 ms 4320 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 108 ms 4308 KB Output is correct
13 Correct 159 ms 4308 KB Output is correct
14 Correct 113 ms 4308 KB Output is correct
15 Correct 354 ms 4300 KB Output is correct
16 Correct 458 ms 4308 KB Output is correct
17 Correct 185 ms 4308 KB Output is correct
18 Correct 533 ms 4308 KB Output is correct
19 Correct 511 ms 4308 KB Output is correct
20 Correct 189 ms 4308 KB Output is correct
21 Incorrect 1 ms 340 KB Output isn't correct
22 Halted 0 ms 0 KB -