oj.uz

답안 #734577

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
734577 2023-05-02T16:36:04 Z 1075508020060209tc Let's Win the Election (JOI22_ho_t3) C++14
21 / 100
 301 ms 4432 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]=1000000;
    }
}

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]>500000){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--){
    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 0 ms 340 KB Output is correct
5 Correct 4 ms 4276 KB Output is correct
6 Correct 3 ms 4308 KB Output is correct
7 Correct 4 ms 4308 KB Output is correct
8 Correct 5 ms 4308 KB Output is correct
9 Correct 4 ms 4308 KB Output is correct
10 Correct 3 ms 4308 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 0 ms 340 KB Output is correct
5 Correct 4 ms 4276 KB Output is correct
6 Correct 3 ms 4308 KB Output is correct
7 Correct 4 ms 4308 KB Output is correct
8 Correct 5 ms 4308 KB Output is correct
9 Correct 4 ms 4308 KB Output is correct
10 Correct 3 ms 4308 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 49 ms 4308 KB Output is correct
13 Correct 49 ms 4308 KB Output is correct
14 Correct 30 ms 4308 KB Output is correct
15 Correct 153 ms 4308 KB Output is correct
16 Correct 116 ms 4308 KB Output is correct
17 Correct 30 ms 4308 KB Output is correct
18 Correct 301 ms 4308 KB Output is correct
19 Correct 127 ms 4308 KB Output is correct
20 Correct 28 ms 4320 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 267 ms 4308 KB Output is correct
2 Correct 246 ms 4308 KB Output is correct
3 Correct 239 ms 4300 KB Output is correct
4 Correct 240 ms 4300 KB Output is correct
5 Correct 241 ms 4424 KB Output is correct
6 Correct 245 ms 4308 KB Output is correct
7 Correct 246 ms 4432 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 0 ms 340 KB Output is correct
5 Correct 4 ms 4276 KB Output is correct
6 Correct 3 ms 4308 KB Output is correct
7 Correct 4 ms 4308 KB Output is correct
8 Correct 5 ms 4308 KB Output is correct
9 Correct 4 ms 4308 KB Output is correct
10 Correct 3 ms 4308 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 49 ms 4308 KB Output is correct
13 Correct 49 ms 4308 KB Output is correct
14 Correct 30 ms 4308 KB Output is correct
15 Correct 153 ms 4308 KB Output is correct
16 Correct 116 ms 4308 KB Output is correct
17 Correct 30 ms 4308 KB Output is correct
18 Correct 301 ms 4308 KB Output is correct
19 Correct 127 ms 4308 KB Output is correct
20 Correct 28 ms 4320 KB Output is correct
21 Incorrect 1 ms 340 KB Output isn't correct
22 Halted 0 ms 0 KB -