Submission #943140

#	Time	Username	Problem	Language	Result	Execution time	Memory
943140		Tuanlinh123	Nicelines (RMI20_nicelines)	C++17	34.17 / 100	36 ms	612 KiB

nicelines

#include "nice_lines.h"
#include<bits/stdc++.h>
#define ll int
#define pll pair<ll, ll>
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define ld long double
#define sz(a) ((ll)(a).size())
using namespace std;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
ll random(ll l, ll r){return l+rng()%(r-l+1);}

const ld eps=1e-7;
void solve(ll subtask_id, ll n) 
{
    ll V=1e4, X=V*2+1;
    auto calc=[&](ld y){return query(X, y);};
    vector <ll> va, vb;
    function<void(ld, ld, ld, ld)> DnC=[&](ld l, ld r, ld fl, ld fr)
    {
        ld mid=(l+r)/2, fm=calc(mid);
        if (abs((fl+fr)/2-fm)<eps) return;
        if ((r-l)<1.0)
        {
            long double c=(calc(r+0.1)-fr-fl+calc(l-0.1))/2;
            long double d=sqrtl(max<long double>(0.0, 0.1*0.1-c*c));
            ll a=round(d/c);
            if (mid<-eps) a=-a;
            ll b=round(mid-X*a);
            va.push_back(a), vb.push_back(b);
            return;
        }
        DnC(l, mid, fl, fm), DnC(mid, r, fm, fr);
        return;
    };
    ld l=-V*X-V-random(0, 10), r=V*X+V+random(0, 10);
    DnC(l, r, calc(l), calc(r));
    the_lines_are(va, vb);
}

• Subtask 1: 0 / 11
• Subtask 2: 13 / 13
• Subtask 3: 7 / 7
• Subtask 4: 14.168045426599999 / 19
• Subtask 5: 0 / 23
• Subtask 6: 0 / 27