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Submission #831504

# Submission time Handle Problem Language Result Execution time Memory
831504 2023-08-20T09:57:43 Z jasmin Let's Win the Election (JOI22_ho_t3) C++17
10 / 100
 470 ms 1008588 KB 
//JOI 2022 Final Round
#include<bits/stdc++.h>
using namespace std;
//#define double long double

const int N=505;
double dp[N][N][N];

const double INF=1e9+7;

void init(){
    for(int i=0; i<N; i++){
        for(int j=0; j<N; j++){
            for(int k=0; k<N; k++){
                dp[i][j][k] = INF;
            }
        }
    }
}

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    int n, k;
    cin >> n >> k;
    vector<int> a(n);
    vector<int> b(n);
    for(int i=0; i<n; i++){

        cin >> a[i] >> b[i];
    }

    vector<int> sorted(n);
    iota(sorted.begin(), sorted.end(), 0);
    sort(sorted.begin(), sorted.end(), [&](int i, int j){
        if(b[i]==-1) return false;
        if(b[j]==-1) return true;

        return b[i]<b[j];
    });

    cout.precision(300);

    init();
    dp[0][0][0]=(double)0;
    for(int i=0; i<n; i++){
        int ind=sorted[i];
        //cout << i << ": " << ind << "\n";

        for(int x=0; x<=i+1; x++){
            for(int y=0; y<=x; y++){

                dp[i+1][x][y] = dp[i][x][y];

                if(0<x){

                    dp[i+1][x][y] = min(dp[i+1][x][y], dp[i][x-1][y] + (double)a[ind]/(double)(y+1));
                }
                if(0<y && b[ind]!=-1){

                    dp[i+1][x][y] = min(dp[i+1][x][y], dp[i][x-1][y-1] + (double)b[ind]/(double)y);
                    //cout << dp[i][x-1][y-1] << "\n";
                }

                //cout << i << " " << x << " "  << y << ": " << dp[i+1][x][y] << "\n";

            }
        }
    }

    double ans=INF;
    for(int y=0; y<=n; y++){
        ans = min(ans, dp[n][k][y]);
    }
    cout << ans << "\n";
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 357 ms 1008300 KB Output is correct
2 Correct 339 ms 1008348 KB Output is correct
3 Correct 351 ms 1008316 KB Output is correct
4 Correct 344 ms 1008400 KB Output is correct
5 Correct 470 ms 1008428 KB Output is correct
6 Correct 379 ms 1008408 KB Output is correct
7 Correct 382 ms 1008544 KB Output is correct
8 Correct 421 ms 1008436 KB Output is correct
9 Correct 420 ms 1008448 KB Output is correct
10 Correct 376 ms 1008344 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 357 ms 1008300 KB Output is correct
2 Correct 339 ms 1008348 KB Output is correct
3 Correct 351 ms 1008316 KB Output is correct
4 Correct 344 ms 1008400 KB Output is correct
5 Correct 470 ms 1008428 KB Output is correct
6 Correct 379 ms 1008408 KB Output is correct
7 Correct 382 ms 1008544 KB Output is correct
8 Correct 421 ms 1008436 KB Output is correct
9 Correct 420 ms 1008448 KB Output is correct
10 Correct 376 ms 1008344 KB Output is correct
11 Correct 343 ms 1008412 KB Output is correct
12 Correct 412 ms 1008428 KB Output is correct
13 Correct 399 ms 1008336 KB Output is correct
14 Correct 373 ms 1008332 KB Output is correct
15 Correct 422 ms 1008588 KB Output is correct
16 Correct 402 ms 1008432 KB Output is correct
17 Correct 383 ms 1008428 KB Output is correct
18 Correct 407 ms 1008428 KB Output is correct
19 Correct 385 ms 1008484 KB Output is correct
20 Correct 405 ms 1008352 KB Output is correct

Subtask #3
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 327 ms 1008448 KB Output is correct
2 Correct 326 ms 1008448 KB Output is correct
3 Correct 359 ms 1008364 KB Output is correct
4 Correct 321 ms 1008348 KB Output is correct
5 Correct 327 ms 1008400 KB Output is correct
6 Correct 360 ms 1008336 KB Output is correct
7 Correct 323 ms 1008500 KB Output is correct
8 Correct 349 ms 1008312 KB Output is correct
9 Incorrect 324 ms 1008420 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 327 ms 1008448 KB Output is correct
2 Correct 326 ms 1008448 KB Output is correct
3 Correct 359 ms 1008364 KB Output is correct
4 Correct 321 ms 1008348 KB Output is correct
5 Correct 327 ms 1008400 KB Output is correct
6 Correct 360 ms 1008336 KB Output is correct
7 Correct 323 ms 1008500 KB Output is correct
8 Correct 349 ms 1008312 KB Output is correct
9 Incorrect 324 ms 1008420 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 327 ms 1008448 KB Output is correct
2 Correct 326 ms 1008448 KB Output is correct
3 Correct 359 ms 1008364 KB Output is correct
4 Correct 321 ms 1008348 KB Output is correct
5 Correct 327 ms 1008400 KB Output is correct
6 Correct 360 ms 1008336 KB Output is correct
7 Correct 323 ms 1008500 KB Output is correct
8 Correct 349 ms 1008312 KB Output is correct
9 Incorrect 324 ms 1008420 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 421 ms 1008436 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 357 ms 1008300 KB Output is correct
2 Correct 339 ms 1008348 KB Output is correct
3 Correct 351 ms 1008316 KB Output is correct
4 Correct 344 ms 1008400 KB Output is correct
5 Correct 470 ms 1008428 KB Output is correct
6 Correct 379 ms 1008408 KB Output is correct
7 Correct 382 ms 1008544 KB Output is correct
8 Correct 421 ms 1008436 KB Output is correct
9 Correct 420 ms 1008448 KB Output is correct
10 Correct 376 ms 1008344 KB Output is correct
11 Correct 343 ms 1008412 KB Output is correct
12 Correct 412 ms 1008428 KB Output is correct
13 Correct 399 ms 1008336 KB Output is correct
14 Correct 373 ms 1008332 KB Output is correct
15 Correct 422 ms 1008588 KB Output is correct
16 Correct 402 ms 1008432 KB Output is correct
17 Correct 383 ms 1008428 KB Output is correct
18 Correct 407 ms 1008428 KB Output is correct
19 Correct 385 ms 1008484 KB Output is correct
20 Correct 405 ms 1008352 KB Output is correct
21 Correct 327 ms 1008448 KB Output is correct
22 Correct 326 ms 1008448 KB Output is correct
23 Correct 359 ms 1008364 KB Output is correct
24 Correct 321 ms 1008348 KB Output is correct
25 Correct 327 ms 1008400 KB Output is correct
26 Correct 360 ms 1008336 KB Output is correct
27 Correct 323 ms 1008500 KB Output is correct
28 Correct 349 ms 1008312 KB Output is correct
29 Incorrect 324 ms 1008420 KB Output isn't correct
30 Halted 0 ms 0 KB -