oj.uz

Submission #593626

# Submission time Handle Problem Language Result Execution time Memory
593626 2022-07-11T12:58:22 Z welleyth Let's Win the Election (JOI22_ho_t3) C++17
10 / 100
 2500 ms 384 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;

#define int long long
#define mp make_pair
#define pb push_back

#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("avx2")

constexpr int INF = (int)2e15;
constexpr int N = (int)4e5 + 111;
constexpr int md = (int)1e9+7;
constexpr int mdPower = (int)1e9+7 - 1;
constexpr double eps = 1e-7;

typedef __int128 _uint;
typedef long long ll;

mt19937_64 rnd(time(nullptr));

void add(int& a,int b){
    a += b; if(a >= md) a -= md;
}
void sub(int& a,int b){
    a -= b; while(a < 0) a += md;
}
void add(__int128& a,int b){
    a += b;
}
void sub(__int128& a,int b){
    a -= b;
}

int bpow(int a,int b){
    if(b == 0)
        return 1;
    if(b % 2 == 0){
        int t = bpow(a,b>>1);
        return 1ll*t*t%md;
    }
    return 1ll * a*bpow(a,b-1) % md;
}

int inv(int a){
    return bpow(a,md-2);
}

//int fac[N],invfac[N];
//
//void init(){
//    fac[0] = 1;
//    for(int i = 1; i < N; i++){
//        fac[i] = (fac[i-1] * i) % md;
//    }
//    invfac[N-1] = inv(fac[N-1]);
//    for(int i = N-2; i >= 0; i--){
//        invfac[i] = (invfac[i+1] * (i+1))%md;
//    }
//    return;
//}
//
//int C(int n,int k){
//    if(k > n)
//        return 0;
//    return fac[n] * invfac[k] % md * invfac[n-k] % md;
//}
//
//int A(int n,int k){
//    if(k > n)
//        return 0;
//    return fac[n] * invfac[n-k] % md;
//

void solve(){
    int n;
    cin >> n;
    int k;
    cin >> k;
    int a[n],b[n];
    vector<pair<int,int>> v;
    for(int i = 0; i < n; i++){
        cin >> a[i] >> b[i];
        v.pb(mp(a[i],b[i]));
    }
    sort(v.begin(),v.end());
    for(int i = 0; i < n; i++){
        a[i] = v[i].first;
        b[i] = v[i].second;
    }

    long double ans = INF;
    v.clear();

    for(int cnt = 0; cnt <= k; cnt++){ /// total number of dyplomats
        for(int cnt2 = 0; cnt2 <= cnt; cnt2++){ /// dyplomats from right
            int r = cnt2;
            int l = cnt - cnt2;
            v.clear();
            int sum = 0;
            long double t = 0;
            for(int i = 0; i < k-r; i++){
                if(b[i] != -1){
                    v.pb(mp(b[i],-a[i]));
                }
                sum += a[i];
            }
            if(v.size() < l)
                continue;
            sort(v.begin(),v.end());
            vector<int> p;
            for(int i = 0; i < l; i++){
                p.pb(v[i].first);
                sum += v[i].second;
            }
            vector<int> y;
            for(int i = k-r; i < n; i++){
                if(b[i] != -1)
                    y.pb(b[i]);
            }
            if(y.size() < r)
                continue;
            sort(y.begin(),y.end());
            for(int i = 0; i < r; i++){
                p.pb(y[i]);
            }
            sort(p.begin(),p.end());
            for(int i = 0; i < p.size(); i++){
                t += 1.0 * p[i] / (i+1);
            }
            ans = min(ans,t + 1.0 * sum / (cnt+1));
//            cerr << cnt << " " << cnt2 << " " << sum << " " << t << "\n";
//            cerr << "cur = " << t + 1.0 * sum / (cnt+1) << "\n";
        }
    }

    cout << fixed << setprecision(10) << ans << "\n";

    return;
}

signed main(){
    ios::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr);
    int tests = 1;
//    cin >> tests;
    for(int test = 1; test <= tests; test++){
//        cerr << "test = " << test << "\n";
        solve();
    }
    return 0;
}
/**

**/

Compilation message

Main.cpp: In function 'void solve()':
Main.cpp:112:25: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
  112 |             if(v.size() < l)
      |                ~~~~~~~~~^~~
Main.cpp:125:25: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
  125 |             if(y.size() < r)
      |                ~~~~~~~~~^~~
Main.cpp:132:30: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  132 |             for(int i = 0; i < p.size(); i++){
      |                            ~~^~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 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 328 KB Output is correct
6 Correct 2 ms 340 KB Output is correct
7 Correct 9 ms 348 KB Output is correct
8 Correct 26 ms 340 KB Output is correct
9 Correct 58 ms 340 KB Output is correct
10 Correct 21 ms 340 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 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 328 KB Output is correct
6 Correct 2 ms 340 KB Output is correct
7 Correct 9 ms 348 KB Output is correct
8 Correct 26 ms 340 KB Output is correct
9 Correct 58 ms 340 KB Output is correct
10 Correct 21 ms 340 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 98 ms 340 KB Output is correct
13 Correct 39 ms 344 KB Output is correct
14 Correct 7 ms 340 KB Output is correct
15 Correct 673 ms 340 KB Output is correct
16 Correct 254 ms 340 KB Output is correct
17 Correct 54 ms 340 KB Output is correct
18 Correct 1666 ms 340 KB Output is correct
19 Correct 484 ms 384 KB Output is correct
20 Correct 130 ms 340 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 212 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 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Incorrect 1 ms 324 KB Output isn't correct
16 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 212 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 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Incorrect 1 ms 324 KB Output isn't correct
16 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 212 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 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Incorrect 1 ms 324 KB Output isn't correct
16 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2559 ms 340 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 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 328 KB Output is correct
6 Correct 2 ms 340 KB Output is correct
7 Correct 9 ms 348 KB Output is correct
8 Correct 26 ms 340 KB Output is correct
9 Correct 58 ms 340 KB Output is correct
10 Correct 21 ms 340 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 98 ms 340 KB Output is correct
13 Correct 39 ms 344 KB Output is correct
14 Correct 7 ms 340 KB Output is correct
15 Correct 673 ms 340 KB Output is correct
16 Correct 254 ms 340 KB Output is correct
17 Correct 54 ms 340 KB Output is correct
18 Correct 1666 ms 340 KB Output is correct
19 Correct 484 ms 384 KB Output is correct
20 Correct 130 ms 340 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 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 212 KB Output is correct
27 Correct 1 ms 212 KB Output is correct
28 Correct 1 ms 332 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 1 ms 212 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Correct 1 ms 212 KB Output is correct
35 Incorrect 1 ms 324 KB Output isn't correct
36 Halted 0 ms 0 KB -