oj.uz

Submission #879644

# Submission time Handle Problem Language Result Execution time Memory
879644 2023-11-27T19:22:12 Z mychecksedad Let's Win the Election (JOI22_ho_t3) C++17
10 / 100
 4 ms 15192 KB 
/* Author : Mychecksdead  */
#include<bits/stdc++.h>
using namespace std;
#define ll long long int
#define MOD (1000000000+7)
#define MOD1 (998244353)
#define pb push_back
#define all(x) x.begin(), x.end()
#define en cout << '\n'
const int N = 1e3+100, M = 1e5+10, K = 52, MX = 30;


int n, k, sum[N][N];
array<int, 2> a[N];
pair<int, double> dp[N][N];

double get(int x, double y, double j){
  return y + x/j; 
}

void solve(){
  cin >> n >> k;
  for(int i = 1; i <= n; ++i){
    cin >> a[i][1] >> a[i][0];
    if(a[i][0] == -1) a[i][0] = MOD;
  }
  sort(a+1, a+1+n);

  sum[n+1][0] = 0;
  for(int i = n; i >= 1; --i){
    for(int j = 0; j < n - i + 1; ++j){
      sum[i][j] = min(sum[i + 1][j], j == 0 ? MOD : sum[i + 1][j - 1] + a[i][1]);
    }
    sum[i][n - i + 1] = sum[i + 1][n - i] + a[i][1];
  }
  double ans = sum[1][k];

  for(int i = 0; i <= n; ++i) for(int j = 0; j <= n; ++j) dp[i][j] = {MOD, MOD};
  dp[0][0] = {0, 0};
  for(int i = 1; i <= k; ++i){
    dp[i][0] = dp[i - 1][0];
    dp[i][0].first += a[i][1];
    for(int j = 1; j <= i; ++j){
      double val1 = get(dp[i - 1][j].first + a[i][1], dp[i - 1][j].second, j + 1);
      double val2 = get(dp[i - 1][j - 1].first, dp[i - 1][j - 1].second + a[i][0] / (double) j, j + 1);
      if(val1 <= val2){
        dp[i][j] = {dp[i - 1][j].first + a[i][1], dp[i - 1][j].second};
      }else{
        dp[i][j] = {dp[i - 1][j - 1].first, dp[i - 1][j - 1].second + a[i][0] / (double) j};
      }
      ans = min(ans, get(sum[i + 1][k - i] + dp[i][j].first, dp[i][j].second, j + 1));
    }
  }
  cout << fixed << setprecision(5);
  cout << ans;
}


int main(){
  cin.tie(0); ios::sync_with_stdio(0);
  int tt = 1, aa;
  // freopen("in.txt", "r", stdin);
  // freopen("out.txt", "w", stdout);
  while(tt--){
    solve();
    en;
  }
  cerr<<"time taken : "<<(float)clock()/CLOCKS_PER_SEC<<" seconds\n";
  return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:61:15: warning: unused variable 'aa' [-Wunused-variable]
   61 |   int tt = 1, aa;
      |               ^~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 2 ms 14940 KB Output is correct
6 Correct 2 ms 14940 KB Output is correct
7 Correct 2 ms 14940 KB Output is correct
8 Correct 4 ms 14940 KB Output is correct
9 Correct 3 ms 14940 KB Output is correct
10 Correct 3 ms 14940 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 2 ms 14940 KB Output is correct
6 Correct 2 ms 14940 KB Output is correct
7 Correct 2 ms 14940 KB Output is correct
8 Correct 4 ms 14940 KB Output is correct
9 Correct 3 ms 14940 KB Output is correct
10 Correct 3 ms 14940 KB Output is correct
11 Correct 0 ms 2396 KB Output is correct
12 Correct 2 ms 14936 KB Output is correct
13 Correct 2 ms 14940 KB Output is correct
14 Correct 2 ms 14940 KB Output is correct
15 Correct 2 ms 14936 KB Output is correct
16 Correct 3 ms 14940 KB Output is correct
17 Correct 3 ms 15192 KB Output is correct
18 Correct 3 ms 14940 KB Output is correct
19 Correct 3 ms 14808 KB Output is correct
20 Correct 3 ms 14940 KB Output is correct

Subtask #3
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Incorrect 0 ms 2396 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Incorrect 0 ms 2396 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Incorrect 0 ms 2396 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 14828 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 2 ms 14940 KB Output is correct
6 Correct 2 ms 14940 KB Output is correct
7 Correct 2 ms 14940 KB Output is correct
8 Correct 4 ms 14940 KB Output is correct
9 Correct 3 ms 14940 KB Output is correct
10 Correct 3 ms 14940 KB Output is correct
11 Correct 0 ms 2396 KB Output is correct
12 Correct 2 ms 14936 KB Output is correct
13 Correct 2 ms 14940 KB Output is correct
14 Correct 2 ms 14940 KB Output is correct
15 Correct 2 ms 14936 KB Output is correct
16 Correct 3 ms 14940 KB Output is correct
17 Correct 3 ms 15192 KB Output is correct
18 Correct 3 ms 14940 KB Output is correct
19 Correct 3 ms 14808 KB Output is correct
20 Correct 3 ms 14940 KB Output is correct
21 Correct 1 ms 2396 KB Output is correct
22 Correct 0 ms 2396 KB Output is correct
23 Correct 1 ms 2396 KB Output is correct
24 Correct 0 ms 2396 KB Output is correct
25 Correct 1 ms 2396 KB Output is correct
26 Correct 0 ms 2396 KB Output is correct
27 Correct 0 ms 2396 KB Output is correct
28 Correct 1 ms 2396 KB Output is correct
29 Correct 1 ms 2396 KB Output is correct
30 Correct 1 ms 2396 KB Output is correct
31 Correct 1 ms 2396 KB Output is correct
32 Correct 1 ms 2396 KB Output is correct
33 Correct 1 ms 2396 KB Output is correct
34 Incorrect 0 ms 2396 KB Output isn't correct
35 Halted 0 ms 0 KB -