oj.uz

Submission #554432

# Submission time Handle Problem Language Result Execution time Memory
554432 2022-04-28T11:37:45 Z Ronin13 Let's Win the Election (JOI22_ho_t3) C++14
10 / 100
 458 ms 2380 KB 
#include<bits/stdc++.h>
#define ll long long
#define f first
#define s second
#define pii pair<int,int>
#define pll pair<ll,ll>
#define ull unsigned ll
#define pb push_back
#define epb emplace_back
using namespace std;

const double inf = 1e9 + 1;

int main(){
    int n; cin >> n;
    int k; cin >> k;
    pair<double, double> a[n + 1];
    for(int i = 1; i <= n; i++){
        cin >> a[i].s >> a[i].f;
        if(a[i].f == -1) a[i].f = inf;
    }
    sort(a + 1, a + 1 + n);
    for(int i = 1; i <= n; i++){
        //cout << a[i].f << ' ' << a[i].s << "\n";
    }
    double ans = inf;
    for(double x = 0; x <= n; x++){
        double dp[n + 1][n + 1];
        for(int i = 0; i <= n; i++){
            for(int j = 0; j <= n; j++) dp[i][j] = inf;
        }
        dp[0][0] = 0;
        for(int i = 1; i <= n; i++){
            for(int j = 0; j <= n; j++){
                double i1 = i;
                double j1 = j;
                if(j > 0)dp[i][j] =min(dp[i][j], dp[i - 1][j - 1] + a[i].f / j1);
                dp[(int)i][(int)j] = min(dp[i][j], dp[i - 1][j] + a[i].s / (x + 1));
            }
        }
        double cursum = 0;
        multiset <pair<double, int> > st;
        for(int i = 1; i <= n; i++){
            cursum += a[i].s;
            st.insert({a[i].s, i});
        }
        while(st.size() > k) {
            cursum -= st.rbegin() -> f;
            st.erase(st.find(*st.rbegin()));
        }
        for(int i = 1; i <= n; i++){
            double cur = dp[i - 1][(int)x];
            cur += cursum / (x + 1);
            if(ans > cur){
                //cout << dp[i - 1][x] << "\n";
                //cout << x << ' ' << i;
                //cout << "\n";
                ans = cur;
            }
            multiset <pair<double, int> > :: iterator it = st.find({a[i].s, i});
            if(it != st.end()){
                cursum -= a[i].s;
                st.erase({a[i].s, i});
            }
            if(st.size() > k - i && !st.empty()){
                cursum -= st.rbegin() -> f;
                st.erase(st.find(*st.rbegin()));
            }
        }
    }
    cout << fixed << setprecision(7) << ans;
    return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:35:24: warning: unused variable 'i1' [-Wunused-variable]
   35 |                 double i1 = i;
      |                        ^~
Main.cpp:47:25: warning: comparison of integer expressions of different signedness: 'std::multiset<std::pair<double, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   47 |         while(st.size() > k) {
      |               ~~~~~~~~~~^~~
Main.cpp:65:26: warning: comparison of integer expressions of different signedness: 'std::multiset<std::pair<double, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   65 |             if(st.size() > k - i && !st.empty()){
      |                ~~~~~~~~~~^~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 300 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 399 ms 2280 KB Output is correct
6 Correct 420 ms 2276 KB Output is correct
7 Correct 451 ms 2276 KB Output is correct
8 Correct 406 ms 2280 KB Output is correct
9 Correct 389 ms 2280 KB Output is correct
10 Correct 388 ms 2280 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 300 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 399 ms 2280 KB Output is correct
6 Correct 420 ms 2276 KB Output is correct
7 Correct 451 ms 2276 KB Output is correct
8 Correct 406 ms 2280 KB Output is correct
9 Correct 389 ms 2280 KB Output is correct
10 Correct 388 ms 2280 KB Output is correct
11 Correct 1 ms 300 KB Output is correct
12 Correct 407 ms 2276 KB Output is correct
13 Correct 396 ms 2280 KB Output is correct
14 Correct 400 ms 2276 KB Output is correct
15 Correct 390 ms 2280 KB Output is correct
16 Correct 418 ms 2280 KB Output is correct
17 Correct 403 ms 2280 KB Output is correct
18 Correct 389 ms 2276 KB Output is correct
19 Correct 392 ms 2276 KB Output is correct
20 Correct 419 ms 2276 KB Output is correct

Subtask #3
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 300 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 300 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 296 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 2 ms 296 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Incorrect 1 ms 296 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 212 KB Output is correct
2 Correct 1 ms 300 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 300 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 296 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 2 ms 296 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Incorrect 1 ms 296 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 212 KB Output is correct
2 Correct 1 ms 300 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 300 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 296 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 2 ms 296 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Incorrect 1 ms 296 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 417 ms 2284 KB Output is correct
2 Correct 458 ms 2308 KB Output is correct
3 Correct 386 ms 2296 KB Output is correct
4 Incorrect 385 ms 2380 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 300 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 399 ms 2280 KB Output is correct
6 Correct 420 ms 2276 KB Output is correct
7 Correct 451 ms 2276 KB Output is correct
8 Correct 406 ms 2280 KB Output is correct
9 Correct 389 ms 2280 KB Output is correct
10 Correct 388 ms 2280 KB Output is correct
11 Correct 1 ms 300 KB Output is correct
12 Correct 407 ms 2276 KB Output is correct
13 Correct 396 ms 2280 KB Output is correct
14 Correct 400 ms 2276 KB Output is correct
15 Correct 390 ms 2280 KB Output is correct
16 Correct 418 ms 2280 KB Output is correct
17 Correct 403 ms 2280 KB Output is correct
18 Correct 389 ms 2276 KB Output is correct
19 Correct 392 ms 2276 KB Output is correct
20 Correct 419 ms 2276 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 300 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 1 ms 212 KB Output is correct
26 Correct 1 ms 300 KB Output is correct
27 Correct 1 ms 212 KB Output is correct
28 Correct 1 ms 296 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 2 ms 296 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Incorrect 1 ms 296 KB Output isn't correct
35 Halted 0 ms 0 KB -