結果

問題 No.62 リベリオン(Extra)
ユーザー maine_honzukimaine_honzuki
提出日時 2020-05-10 01:42:34
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
WA  
実行時間 -
コード長 3,070 bytes
コンパイル時間 1,325 ms
コンパイル使用メモリ 172,340 KB
実行使用メモリ 6,940 KB
最終ジャッジ日時 2024-07-06 12:07:49
合計ジャッジ時間 6,349 ms
ジャッジサーバーID
(参考情報)
judge5 / judge2
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 2 ms
6,812 KB
testcase_01 AC 3 ms
6,940 KB
testcase_02 AC 1,268 ms
6,940 KB
testcase_03 AC 1,237 ms
6,940 KB
testcase_04 WA -
権限があれば一括ダウンロードができます

ソースコード

diff #

#include <bits/stdc++.h>
using namespace std;
using ll = long long;

ll W, H, D, Vx, Vy;

ll gcd(ll a, ll b) {
    while (b) {
        ll c = b;
        b = a % b;
        a = c;
    }
    return a;
}

ll extgcd(ll a, ll b, ll& x, ll& y) {
    if (b) {
        ll d = extgcd(b, a % b, y, x);
        y -= a / b * x;
        return d;
    } else {
        x = 1;
        y = 0;
        return a;
    }
}

ll rem(ll& a, ll b) {
    return ((a %= b) += b) %= b;
}


bool hit(ll Mx, ll My) {
    ll My_origin = My;
    ll w = 2 * W, h = 2 * H;
    cerr << Mx << " " << My << endl;
    ll a, b;
    ll g = extgcd(Vx, 2 * W, a, b);
    cerr << "g:" << g << endl;
    if (Mx % g)
        return false;
    rem(a, w);
    a *= Mx / g;
    rem(a, w / g);
    cerr << "a:" << a << endl;
    ll can_add_to_a = w / g;
    cerr << "can_add_to_a:" << can_add_to_a << endl;

    My -= Vy * (a % (h));
    rem(My, h);

    cerr << "My:" << My << endl;
    if (My == 0) {
        return a <= D;
    }

    ll c, d;
    g = extgcd(Vy * can_add_to_a, h, c, d);
    assert(Vy * can_add_to_a * c + h * d == g);
    c *= can_add_to_a;

    if (My % g) return false;
    c *= (My / g);

    cerr << "Mx,My:" << endl
         << Mx << " " << My_origin << endl;
    cerr << (Vx * ((a + c) % w)) % w << " " << (Vy * ((a + c) % h)) % h << endl;
    cerr << (Vx * a) % w << " " << (Vy * a) % w << endl;


    rem(c, h / gcd(h, Vy) * can_add_to_a);
    cerr << "c:" << c << endl;
    cerr << "h:" << h << endl;
    cerr << h % gcd(h, Vy) << endl;
    cerr << h / gcd(h, Vy) << endl;

    cerr << "Mx,My:" << endl
         << Mx << " " << My_origin << endl;
    cerr << (Vx * ((a + c) % w)) % w << " " << (Vy * ((a + c) % h)) % h << endl;
    cerr << (Vx * a) % w << " " << (Vy * a) % w << endl;

    cerr << c % can_add_to_a << endl;


    /*
    while (c < a)
        c += 2 * H / g;
        */
    return c + a <= D;
}

int main() {
    int Q;
    cin >> Q;
    while (Q--) {
        ll Mx, My, Hx, Hy;
        cin >> W >> H >> D >> Mx >> My >> Hx >> Hy >> Vx >> Vy;
        ll g = gcd(abs(Vx), abs(Vy));
        Vx /= g;
        Vy /= g;
        D *= g;
        if (Vx < 0) {
            Vx *= -1;
            Hx = W - Hx;
            Mx = W - Mx;
        }
        if (Vy < 0) {
            Vy *= -1;
            Hy = H - Hy;
            My = H - My;
        }
        Vx %= 2 * W;
        Vy %= 2 * H;
        ll mx, my;
        bool ans = false;
        cerr << Vx << " " << Vy << endl;
        for (int i = 0; i < 4; i++) {
            if (i < 2)
                mx = Mx;
            else
                mx = W * 2 - Mx;
            if (i % 2 == 0)
                my = My;
            else
                my = H * 2 - My;
            mx -= Hx;
            my -= Hy;
            if (mx < 0)
                mx += W * 2;
            if (my < 0)
                my += H * 2;
            bool flag = hit(mx, my);
            ans |= flag;
            cerr << i << " " << (flag ? "Yes" : "No") << endl;
            cerr << endl;
        }
        cout << (ans ? "Hit" : "Miss") << endl;
    }
}
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