Submission #923791

#	Time	Username	Problem	Language	Result	Execution time	Memory
923791		Amr	Let's Win the Election (JOI22_ho_t3)	C++14	28 / 100	2547 ms	692 KiB

Main

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
#define S second
#define F first
#define all(x) (x).begin(),(x).end()
#define sz size()
#define Yes cout << "YES" << endl
#define No cout << "NO" << endl
#define pb(x) push_back(x);
#define endl '\n'
#define fast ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
const int N=3e5+7;
ll INF=INT_MAX,mod=1e9+7;
int TT=1;
ll power(ll x, unsigned int y)
{
    ll res = 1;
    x = x; // % mod;
    if (x == 0) return 0;
    while (y > 0)
    {
        if (y & 1) res = (res*x)  ; // % mod;
        y = y>>1;
        x = (x*x) ; // % mod;
    }
    return res;
}
ll n , k;
pair<ll,ll> a[N];
vector<ll> v;
vector<ll> v2;
bool cmp(pair<ll,ll> x , pair<ll,ll> y)
{
    return x.S < y.S;
}
void solve()
{
    cin >> n >> k;
    for(int i = 1; i <= n ;i++) cin >> a[i].F >> a[i].S;
   // sort(a+1,a+1+n,cmp);
    ld allmn = 1e18;
    for(int mask = 0; mask < (1<<n); mask++)
    {
        v.clear(); v2.clear();
        if(__builtin_popcount(mask)>k) continue;
       // cout << mask << ": " << endl;
        bool notgood = 0;
        for(int bit = 0; bit < n; bit++)
        {

            bool cur = (mask>>bit)&1;
            //cout << cur;
            if(cur==1&&a[bit+1].S==-1) {notgood = 1; break;}
            if(cur==1)
            {
                v2.push_back(a[bit+1].S);
            }
            else
            {
                v.push_back(a[bit+1].F);
            }
        }
       // cout << endl;
        if(notgood==1) continue;
        sort(all(v));
        sort(all(v2));
        ld num = 1;
        ld cursum = 0;

        for(int i = 0; i < v2.sz; i++) {cursum+= v2[i]/num/1.0; num++;}
        for(int i = 0; i < k-__builtin_popcount(mask); i++) cursum += v[i]/(num)/1.0;
        allmn = min(allmn,cursum);
       // cout << cursum << endl;

    }
    cout << fixed << setprecision(10) << allmn << endl;
}
int main(){
    //freopen("friday.in","r",stdin);
    //freopen("friday.out","w",stdout);
    fast;
   // cin >> TT;
    while(TT--)
        solve();

    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'void solve()':
Main.cpp:72:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   72 |         for(int i = 0; i < v2.sz; i++) {cursum+= v2[i]/num/1.0; num++;}
      |                          ^

• Subtask 1: 5 / 5
• Subtask 2: 0 / 5
• Subtask 3: 11 / 11
• Subtask 4: 12 / 12
• Subtask 5: 0 / 33
• Subtask 6: 0 / 11
• Subtask 7: 0 / 23