Submission #965243

#	Time	Username	Problem	Language	Result	Execution time	Memory
965243		AtabayRajabli	Wish (LMIO19_noras)	C++17	93 / 100	123 ms	10872 KiB

noras

#include <bits/stdc++.h>

// author : a1abay

#define all(v)      v.begin(), v.end()
#define GCD(a, b)   __gcd(a, b)
#define LCM(a, b)   (a*b / (__gcd(a, b)))
#define int         ll

typedef long long           ll;
typedef long double         ld;
const int inf =             1e9 + 7;
const int inff =            (int)1e18 + 7;
const int sz =              2e5 + 5;
using namespace             std;

int n;
ld r;
vector<array<int, 2>> v;

int disc(int a, int b, int c)
{
    return b * b - 4 * a * c;
}

ld get(ld a, ld b, ld d)
{
    return (-b - sqrtl(d)) / (2 * a);
}

ld get2(ld a, ld b, ld d)
{
    return (-b + sqrtl(d)) / (2 * a);
}

signed main()   
{       
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    
    cin >> n >> r;
    
    for(int i = 1; i <= n; i++)
    {
        int a, b, c, d;
        cin >> a >> b >> c >> d;
        c -= a;
        d -= b;
        int ds = disc(c * c + d * d, 2 * a * c + 2 * b * d, a * a + b * b - r * r);
        if(ds < 0)continue;
        ld x1 = get(c * c + d * d, 2 * a * c + 2 * b * d, ds);
        ld x2 = get2(c * c + d * d, 2 * a * c + 2 * b * d, ds);
        if(x1 > x2)swap(x1, x2);
        if(x2 < 0)continue;
        x1 = ceil(x1);
        x2 = floor(x2);
        if(x1 > x2)continue;
        v.push_back({(int)x1, 1});
        v.push_back({(int)x2 + 1, -1});
    }

    int s = 0, mx = 0;
    sort(all(v));
    for(auto i : v)
    {
        s += i[1];
        mx = max(mx, s);
    }
    cout << mx;
}

• Subtask 1: 23 / 23
• Subtask 2: 23 / 23
• Subtask 3: 15 / 15
• Subtask 4: 32 / 32
• Subtask 5: 0 / 7