QOJ.ac

QOJ

ID题目提交者结果用时内存语言文件大小提交时间测评时间
#884326#9547. Two Convex HolesUESTC_NLNSWA 1ms4096kbC++205.4kb2025-02-06 00:02:592025-02-06 00:03:01

Judging History

This is the latest submission verdict.

  • [2025-02-06 00:03:01]
  • Judged
  • Verdict: WA
  • Time: 1ms
  • Memory: 4096kb
  • [2025-02-06 00:02:59]
  • Submitted

answer

/*
    L(0,0,z0)
    z = z1 -> z=p  <====> p * (z0 / (z0-z1)) = p * al
    p = p0 + vt ------> p = p0 *  al + vt * al
    p1 : p1 * al1 + vt * al1  -------> p1 * al1
    P2 : p2 * al2 + vt * al2  -------> pt * al2 + vt * (al2 - al1)
*/

#include <algorithm>
#include <cmath>
#include <iostream>
#include <vector>

using namespace std;
using ldb = long double;
struct pt {
    ldb x, y;
    pt operator+(const pt& o) const { return {x + o.x, y + o.y}; };
    pt operator-(const pt& o) const { return {x - o.x, y - o.y}; };
    pt operator*(const ldb o) const { return {x * o, y * o}; };
    ldb operator*(const pt& o) const { return o.x * x + o.y * y; }
    ldb operator^(const pt& o) const { return x * o.y - y * o.x; }
};

pt rotate(const pt& a, const pt& v2) {
    return {v2 * a, v2 ^ a};
}
struct seg {
    pt a, b;
    bool operator<(const seg& o) const {
        if (a.y != o.a.y) a.y < o.a.y;
        return b.y < o.b.y;
    }
    pt at(ldb y) const {
        return (b * (y - a.y) + a * (b.y - y)) * (1 / (b.y - a.y));
    }
};
struct poly {
    ldb t, a0, a1, a2, a3;
    bool operator<(const poly& o) const { return t < o.t; }
};
struct item {
    ldb t, v1, v2;
};

void solve() {
    pt a0, v;
    ldb z0, z1, z2;
    cin >> a0.x >> a0.y >> z0 >> v.x >> v.y;
    int n1, n2;
    cin >> n1 >> z1;
    vector<pt> c1(n1);
    for (int i = 0; i < n1; ++i) cin >> c1[i].x >> c1[i].y;
    cin >> n2 >> z2;
    vector<pt> c2(n2);
    for (int i = 0; i < n2; ++i) cin >> c2[i].x >> c2[i].y;
    ldb alp1 = z0 / (z0 - z1);
    ldb alp2 = z0 / (z0 - z2);
    v = v * (alp1 - alp2);
    ldb beta = sqrtl(v * v);
    v = v * (1 / beta);
    // v = rotate(v, v);

    for (auto& u : c1) u = rotate((u - a0) * alp1, v);
    for (auto& u : c2) u = rotate((u - a0) * alp2, v);
    // for (const auto& u : c1) cout << u.x << " " << u.y << '\n';
    // for (const auto& u : c2) cout << u.x << " " << u.y << '\n';

    vector<seg> s1, s2, s3, s4;
    for (int i = 0; i < n1; ++i) {
        auto a = c1[i], b = c1[i == n1 - 1 ? 0 : i + 1];
        if (a.y > b.y)
            s1.push_back({b, a});
        else
            s2.push_back({a, b});
    }
    for (int i = 0; i < n2; ++i) {
        auto a = c2[i], b = c2[i == n2 - 1 ? 0 : i + 1];
        if (a.y > b.y)
            s3.push_back({b, a});
        else
            s4.push_back({a, b});
    }
    sort(s1.begin(), s1.end());
    sort(s2.begin(), s2.end());
    sort(s3.begin(), s3.end());
    sort(s4.begin(), s4.end());

    int cc = 0;
    vector<ldb> time;
    vector<item> q;
    auto update = [&](const seg& s, const seg& t, ldb z0, ldb z1, int f) -> void {
        if (z0 == z1) return;
        auto a = s.at(z0), b = s.at(z1);
        auto c = t.at(z0), d = t.at(z1);
        ldb t1 = c.x - a.x, t2 = d.x - b.x;
        if (t1 < t2) swap(t1, t2);
        ldb val = z1 - z0;
        q.push_back({t1, 0, f * val});
        q.push_back({t2, 0, -f * val});
        q.push_back({t2, f * val, 0});
    };

    for (const auto& s : {s3, s4}) {
        for (const auto& t : {s1, s2}) {
            cc++;
            int f = cc == 1 || cc == 4 ? -1 : 1;

            ldb lst_z = max(s[0].a.y, t[0].a.y);
            for (int i = 0, j = 0; i < s.size() && j < t.size();) {
                if (s[i].b.y < t[j].a.y) {
                    i++;
                    continue;
                }
                if (t[j].b.y < s[i].a.y) {
                    j++;
                    continue;
                }
                ldb nz = min(s[i].b.y, t[j].b.y);
                update(s[i], t[j], lst_z, nz, f);
                lst_z = nz;
                if (nz == t[j].b.y)
                    j++;
                else
                    i++;
            }
        }
    }
    sort(q.begin(), q.end(), [&](const item& a, const item& b) { return a.t < b.t; });

    vector<poly> ans;
    ldb v0 = 0, v1 = 0, s = 0, ss = 0;
    ldb lt = -1e50;
    ans.push_back({lt, s, v0, v1});
    for (int i = 0; i < q.size(); ++i) {
        auto t = q[i].t;
        auto dt = t - lt;
        ss += s * dt + v0 * dt * dt / 2 + v1 * dt * dt * dt / 6;
        s += v0 * dt + v1 * dt * dt / 2;
        v0 += q[i].v1, v1 += q[i].v2;
        lt = t;
        if (i + 1 == q.size() || q[i].t != q[i + 1].t) ans.push_back({q[i].t, ss, s, v0, v1});
    }
    auto query = [&](ldb t) -> ldb {
        auto [lt, a0, a1, a2, a3] = *(--upper_bound(ans.begin(), ans.end(), poly{t, 0, 0, 0}));
        t -= lt;
        return a0 + a1 * t + a2 * t * t / 2 + a3 * t * t * t / 6;
    };

    auto query2 = [&](ldb t) -> ldb {
        auto [lt, a0, a1, a2, a3] = *(--upper_bound(ans.begin(), ans.end(), poly{t, 0, 0, 0}));
        t -= lt;
        return a1 + a2 * t + a3 * t * t;
    };
    // for (const auto [t, a0, a1, a2, a3] : ans) {
    //     cout << t << ":" << a0 << " " << a1 << " " << a2 << " " << a3 << '\n';
    // }
    int cq;
    cin >> cq;
    for (int i = 0; i < cq; ++i) {
        ldb t1, t2;
        cin >> t1 >> t2;
        t2 *= beta, t1 *= beta;
        ldb ans = t1 == t2 ? query2(t1) : (query(t2) - query(t1)) / (t2 - t1);
        // cout << ans << '\n';
        printf("%.8LF\n", ans);
    }
}

int main() {
    // freopen("m.in", "r", stdin);
    cin.tie(0), cout.tie(0), ios::sync_with_stdio(0);
    int t;
    cin >> t;
    while (t--) solve();
}
/*
1
0 0 3 0 -1
4 1
1 0
3 0
3 2
1 2
4 2
0 0
1 0
1 1
0 1
3
0 10
1 2
1 1


*/

詳細信息

Test #1:

score: 100
Accepted
time: 1ms
memory: 3840kb

input:

1
0 0 3 0 -1
4 1
1 0
3 0
3 2
1 2
4 2
0 0
1 0
1 1
0 1
3
0 10
1 2
1 1

output:

0.45000000
1.12500000
2.25000000

result:

ok 3 numbers

Test #2:

score: -100
Wrong Answer
time: 1ms
memory: 4096kb

input:

1
-5448 2169 9 731 -431
64 1
-7417 -2691
-7203 -4235
-6869 -6172
-6746 -6856
-6628 -7104
-5983 -7731
-5755 -7926
-4211 -8457
-3739 -8585
-3653 -8604
-2307 -8877
-998 -9109
-201 -9110
874 -9110
2692 -8754
2984 -8696
3438 -8597
3671 -8536
5152 -8058
5700 -7775
5892 -7619
6304 -7221
7388 -5673
7742 -51...

output:

133236157.18915914

result:

wrong answer 1st numbers differ - expected: '910.01769', found: '133236157.18916', error = '146409.51346'