Submission #922722

#	Time	Username	Problem	Language	Result	Execution time	Memory
922722		GrindMachine	Let's Win the Election (JOI22_ho_t3)	C++17	11 / 100	1821 ms	600 KiB

Main

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) (int)a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x,y) ((x+y-1)/(y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl

#define rep(i,n) for(int i = 0; i < n; ++i)
#define rep1(i,n) for(int i = 1; i <= n; ++i)
#define rev(i,s,e) for(int i = s; i >= e; --i)
#define trav(i,a) for(auto &i : a)

template<typename T>
void amin(T &a, T b) {
    a = min(a,b);
}

template<typename T>
void amax(T &a, T b) {
    a = max(a,b);
}

#ifdef LOCAL
#include "debug.h"
#else
#define debug(x) 42
#endif

/*



*/

const int MOD = 1e9 + 7;
const int N = 1e5 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

void solve(int test_case)
{
    ll n,k; cin >> n >> k;
    vector<pll> a(n);
    rep(i,n) cin >> a[i].ff >> a[i].ss;
    rep(i,n) if(a[i].ss == -1) a[i].ss = inf2;

    auto cmp = [&](pll p1, pll p2){
        return p1.ss < p2.ss;
    };

    sort(all(a),cmp);
    ld ans = inf2;
    vector<ld> dp1(n+5), dp2(n+5);

    rep(cnt,n+1){
        fill(all(dp1),inf2);
        dp1[0] = 0;

        rep(i,n){
            fill(all(dp2),inf2);

            rev(guys,n,0){
                // vote
                amin(dp2[guys],dp1[guys]+(ld)a[i].ff/(cnt+1));

                // collab
                if(a[i].ss != -1){
                    amin(dp2[guys+1],dp1[guys]+(ld)a[i].ss/(guys+1));
                }
            }

            dp1 = dp2;
        }

        amin(ans,dp1[cnt]);
    }

    cout << fixed << setprecision(11);
    cout << ans << endl;
}

int main()
{
    fastio;

    int t = 1;
    // cin >> t;

    rep1(i, t) {
        solve(i);
    }

    return 0;
}

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