제출 #965278

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
965278		AtabayRajabli	Wish (LMIO19_noras)	C++17	93 / 100	124 ms	10724 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;

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

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;
        ld ds = disc(c * c + d * d, 2 * a * c + 2 * b * d, a * a + b * b - r * r);
        if(ds < 0)continue;
        ld x1 = (-(2 * a * c + 2 * b * d) - sqrtl(ds)) / (2 * (c * c + d * d));
        ld x2 = (-(2 * a * c + 2 * b * d) + sqrtl(ds)) / (2 * (c * c + d * d));
        if(x2 < 0LL)continue;
        int x = ceil(x1);
        int y = floor(x2);
        x = max(x, 0LL);
        if(x > y)continue;
        v.push_back({x, 1});
        v.push_back({y + 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