oj.uz

답안 #734579

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
734579 2023-05-02T16:39:53 Z 1075508020060209tc Let's Win the Election (JOI22_ho_t3) C++14
21 / 100
 309 ms 4316 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<=i;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=200000;
    }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 4308 KB Output is correct
6 Correct 4 ms 4308 KB Output is correct
7 Correct 4 ms 4308 KB Output is correct
8 Correct 4 ms 4308 KB Output is correct
9 Correct 4 ms 4308 KB Output is correct
10 Correct 4 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 4308 KB Output is correct
6 Correct 4 ms 4308 KB Output is correct
7 Correct 4 ms 4308 KB Output is correct
8 Correct 4 ms 4308 KB Output is correct
9 Correct 4 ms 4308 KB Output is correct
10 Correct 4 ms 4308 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 86 ms 4300 KB Output is correct
13 Correct 76 ms 4316 KB Output is correct
14 Correct 53 ms 4308 KB Output is correct
15 Correct 174 ms 4308 KB Output is correct
16 Correct 197 ms 4308 KB Output is correct
17 Correct 53 ms 4308 KB Output is correct
18 Correct 259 ms 4308 KB Output is correct
19 Correct 154 ms 4308 KB Output is correct
20 Correct 49 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 293 ms 4308 KB Output is correct
2 Correct 260 ms 4312 KB Output is correct
3 Correct 309 ms 4308 KB Output is correct
4 Correct 255 ms 4308 KB Output is correct
5 Correct 257 ms 4308 KB Output is correct
6 Correct 285 ms 4308 KB Output is correct
7 Correct 271 ms 4308 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 4308 KB Output is correct
6 Correct 4 ms 4308 KB Output is correct
7 Correct 4 ms 4308 KB Output is correct
8 Correct 4 ms 4308 KB Output is correct
9 Correct 4 ms 4308 KB Output is correct
10 Correct 4 ms 4308 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 86 ms 4300 KB Output is correct
13 Correct 76 ms 4316 KB Output is correct
14 Correct 53 ms 4308 KB Output is correct
15 Correct 174 ms 4308 KB Output is correct
16 Correct 197 ms 4308 KB Output is correct
17 Correct 53 ms 4308 KB Output is correct
18 Correct 259 ms 4308 KB Output is correct
19 Correct 154 ms 4308 KB Output is correct
20 Correct 49 ms 4308 KB Output is correct
21 Incorrect 1 ms 340 KB Output isn't correct
22 Halted 0 ms 0 KB -