oj.uz

답안 #806229

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
806229 2023-08-04T05:22:52 Z vjudge1 Let's Win the Election (JOI22_ho_t3) C++14
10 / 100
 6 ms 340 KB 
#include<bits/stdc++.h>
#define fi first
#define se second
#define ll long long
#define ld long double
using namespace std ;
const int N = 500 ;
bool flag1 ;
int n, k ;
bool us[N + 1] ;
ld abu = 1e9 ;
pair<pair<ld, ld>, int> p[N + 1] ;
void rec(int now, ld sum, ld cnt)
{
    if(now == k)
    {
        abu = min(abu, sum) ;
        return ;
    }
    for(int i = 1 ; i <= n ; i++)
    {
        if(us[i])
            continue ;
        us[i] ^= 1 ;
        rec(now + 1, sum + p[i].fi.fi / cnt, cnt) ;
        if(p[i].fi.se != -1)rec(now + 1, sum + p[i].fi.se / cnt, cnt + 1) ;
        us[i] ^= 1 ;
    }
}
signed main()
{
    ios_base::sync_with_stdio( 0 ) ;
    cin.tie( 0 ) ;
    cout.tie( 0 ) ;
    cin >> n ;
    cin >> k ;
    for(int i = 1 ; i <= n ; i++)
    {
        cin >> p[i].fi.fi >> p[i].fi.se ;
        p[i].se = i ;
        if(p[i].fi.se != -1 && p[i].fi.se != p[i].fi.fi)
            flag1 = 1 ;
    }
    if(k == n)
    {
        ld ans = 1e9 ;
        vector<pair<pair<ld, ld>, int>> v_pos, v_neg ;
        for(int i = 1 ; i <= n ; i++)
        {
            if(p[i].fi.se == -1)
                v_neg.push_back(p[i]) ;
            else
                v_pos.push_back({{p[i].fi.se, p[i].fi.fi}, i}) ;
        }
        sort(v_pos.begin(), v_pos.end()) ;
        sort(v_neg.begin(), v_neg.end()) ;
        for(int i = -1 ; i < min(k, (int)v_pos.size()) ; i++)
        {
            int now = i + 1, uk1 = i + 1, uk2 = 0 ;
            ld sum = 0, cnt = 1 ;
            for(int j = 0 ; j <= i ; j++)
            {
                sum += v_pos[j].fi.fi / cnt ;
                cnt++ ;
            }
            while(now < k)
            {
                ld mn = 1e9 ;
                if(uk1 < v_pos.size())
                    mn = v_pos[uk1].fi.se ;
                if(uk2 < v_neg.size())
                    mn = min(mn, v_neg[uk2].fi.fi) ;
                sum += mn / cnt ;
                if(uk1 < v_pos.size() && mn == v_pos[uk1].fi.se)
                    uk1++ ;
                else
                    uk2++ ;
                now++ ;
            }
            ans = min(ans, sum) ;
        }
        cout << fixed << setprecision(9) << ans ;
        return 0 ;
    }
    if(n <= 7)
    {
        rec(0, 0, 1) ;
        cout << fixed << setprecision(9) << abu ;
        return 0 ;
    }
    if(!flag1)
    {
        ld ans = 1e9 ;
        vector<pair<pair<ld, ld>, int>> v_pos, v_neg ;
        for(int i = 1 ; i <= n ; i++)
        {
            if(p[i].fi.se == -1)
                v_neg.push_back(p[i]) ;
            else
                v_pos.push_back({{p[i].fi.se, p[i].fi.fi}, i}) ;
        }
        sort(v_pos.begin(), v_pos.end()) ;
        sort(v_neg.begin(), v_neg.end()) ;
        for(int i = -1 ; i < min(k, (int)v_pos.size()) ; i++)
        {
            int now = i + 1, uk1 = i + 1, uk2 = 0 ;
            ld sum = 0, cnt = 1 ;
            for(int j = 0 ; j <= i ; j++)
            {
                sum += v_pos[j].fi.fi / cnt ;
                cnt++ ;
            }
            while(now < k)
            {
                ld mn = 1e9 ;
                if(uk1 < v_pos.size())
                    mn = v_pos[uk1].fi.se ;
                if(uk2 < v_neg.size())
                    mn = min(mn, v_neg[uk2].fi.fi) ;
                sum += mn / cnt ;
                if(uk1 < v_pos.size() && mn == v_pos[uk1].fi.se)
                    uk1++ ;
                else
                    uk2++ ;
                now++ ;
            }
            ans = min(ans, sum) ;
        }
        cout << fixed << setprecision(9) << ans ;
        return 0 ;
    }
    return 0 ;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:69:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<long double, long double>, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   69 |                 if(uk1 < v_pos.size())
      |                    ~~~~^~~~~~~~~~~~~~
Main.cpp:71:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<long double, long double>, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   71 |                 if(uk2 < v_neg.size())
      |                    ~~~~^~~~~~~~~~~~~~
Main.cpp:74:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<long double, long double>, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |                 if(uk1 < v_pos.size() && mn == v_pos[uk1].fi.se)
      |                    ~~~~^~~~~~~~~~~~~~
Main.cpp:116:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<long double, long double>, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  116 |                 if(uk1 < v_pos.size())
      |                    ~~~~^~~~~~~~~~~~~~
Main.cpp:118:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<long double, long double>, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  118 |                 if(uk2 < v_neg.size())
      |                    ~~~~^~~~~~~~~~~~~~
Main.cpp:121:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<long double, long double>, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  121 |                 if(uk1 < v_pos.size() && mn == v_pos[uk1].fi.se)
      |                    ~~~~^~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 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 324 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 328 KB Output is correct
10 Correct 1 ms 324 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 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 324 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 328 KB Output is correct
10 Correct 1 ms 324 KB Output is correct
11 Correct 1 ms 324 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 328 KB Output is correct
15 Correct 1 ms 328 KB Output is correct
16 Correct 2 ms 324 KB Output is correct
17 Correct 1 ms 324 KB Output is correct
18 Correct 2 ms 340 KB Output is correct
19 Correct 2 ms 324 KB Output is correct
20 Correct 1 ms 324 KB Output is correct

Subtask #3
0 / 11.0

# 결과 실행 시간 메모리 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 2 ms 320 KB Output is correct
6 Correct 6 ms 324 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 2 ms 320 KB Output is correct
9 Correct 2 ms 212 KB Output is correct
10 Correct 3 ms 332 KB Output is correct
11 Correct 3 ms 324 KB Output is correct
12 Correct 2 ms 212 KB Output is correct
13 Correct 3 ms 212 KB Output is correct
14 Incorrect 1 ms 212 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# 결과 실행 시간 메모리 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 2 ms 320 KB Output is correct
6 Correct 6 ms 324 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 2 ms 320 KB Output is correct
9 Correct 2 ms 212 KB Output is correct
10 Correct 3 ms 332 KB Output is correct
11 Correct 3 ms 324 KB Output is correct
12 Correct 2 ms 212 KB Output is correct
13 Correct 3 ms 212 KB Output is correct
14 Incorrect 1 ms 212 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# 결과 실행 시간 메모리 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 2 ms 320 KB Output is correct
6 Correct 6 ms 324 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 2 ms 320 KB Output is correct
9 Correct 2 ms 212 KB Output is correct
10 Correct 3 ms 332 KB Output is correct
11 Correct 3 ms 324 KB Output is correct
12 Correct 2 ms 212 KB Output is correct
13 Correct 3 ms 212 KB Output is correct
14 Incorrect 1 ms 212 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# 결과 실행 시간 메모리 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 324 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 328 KB Output is correct
10 Correct 1 ms 324 KB Output is correct
11 Correct 1 ms 324 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 328 KB Output is correct
15 Correct 1 ms 328 KB Output is correct
16 Correct 2 ms 324 KB Output is correct
17 Correct 1 ms 324 KB Output is correct
18 Correct 2 ms 340 KB Output is correct
19 Correct 2 ms 324 KB Output is correct
20 Correct 1 ms 324 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 2 ms 320 KB Output is correct
26 Correct 6 ms 324 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 2 ms 320 KB Output is correct
29 Correct 2 ms 212 KB Output is correct
30 Correct 3 ms 332 KB Output is correct
31 Correct 3 ms 324 KB Output is correct
32 Correct 2 ms 212 KB Output is correct
33 Correct 3 ms 212 KB Output is correct
34 Incorrect 1 ms 212 KB Output isn't correct
35 Halted 0 ms 0 KB -