oj.uz

Submission #973591

# Submission time Handle Problem Language Result Execution time Memory
973591 2024-05-02T07:55:10 Z berr Let's Win the Election (JOI22_ho_t3) C++17
0 / 100
 982 ms 8404 KB 
#include <bits/stdc++.h>
using namespace std;
const int N = 505;

array<double, 2> dpold[N][N], dpnew[N][N];
 
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    
    int n, k; cin >> n >> k;
    vector<array<int, 2>> a(n);

    for(auto &[i, l]: a) cin >> i >> l;

    sort(a.begin(), a.end(), [&](auto x, auto y){
        if(x[1]==y[1]) return x[0] < y[0];
        else if(y[1]==-1) return true;
        else if(x[1]==-1) return false;
         return x[1]<y[1]; 
    });
    

    for(int i=0; i<=n+1; i++){
        for(int l=0; l<=n+1; l++){
            dpold[i][l]={1e9, 1e9};
        }
    }

    dpold[0][0]={0, 0};

    for(int i=0; i<=n; i++){
        for(int i=0; i<=n+1; i++){
            for(int l=0; l<=n+1; l++){
                dpnew[i][l]={1e9, 1e9};
            }
        }


        for(int l=n; l>=0; l--){
            for(int x=n; x>=0; x--){
              //  cout<<(double)a[i][1]/(double)(l+1)<<"\n";

                if(a[i][1]!=-1)
                dpnew[l+1][x]=min(dpnew[l+1][x], {dpold[l][x][0]+(double)a[i][1]/(double)(l+1), dpold[l][x][1]});
          
                dpnew[l][x+1]=min(dpnew[l][x+1], {dpold[l][x][0], dpold[l][x][1]+(double)a[i][0]});
            }
        }
        for(int i=0; i<=n+1; i++){
            for(int l=0; l<=n+1; l++){
                dpold[i][l]=min(dpold[i][l], dpnew[i][l]);
            }
        }


    }
    double ans=1e9;
    for(int i=0; i<=k; i++){

        ans=min(ans, dpold[i][k-i][0]+(double)dpold[i][k-i][1]/(double)(i+1));
    }

    cout<<setprecision(9)<<fixed<<ans<<"\n";
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 982 ms 8404 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -