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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#85242#4817. Half PlaneScintillaWA 481ms70792kbC++149.7kb2023-03-07 13:26:022023-03-07 13:26:03

Judging History

你现在查看的是最新测评结果

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2023-03-07 13:26:03]
  • 评测
  • 测评结果:WA
  • 用时:481ms
  • 内存:70792kb
  • [2023-03-07 13:26:02]
  • 提交

answer

#include <bits/stdc++.h>

using namespace std;

#define mp make_pair
#define pb emplace_back
#define rep(i, s, e) for (int i = s; i <= e; ++i)
#define drep(i, s, e) for (int i = s; i >= e; --i)
#define file(a) freopen(#a".in", "r", stdin), freopen(#a".out", "w", stdout)
#define pv(a) cout << #a << " = " << a << endl
#define pa(a, l, r) cout << #a " : "; rep(_, l, r) cout << a[_] << ' '; cout << endl

using pii = pair <int, int>;

const int INF = 0x3f3f3f3f;

const int P = 1e9 + 7;

const int N = 6e5 + 10;
const int M = 3e4 + 10;

int read() {
  int x = 0, f = 1; char c = getchar();
  for (; c < '0' || c > '9'; c = getchar()) if (c == '-') f = -1;
  for (; c >= '0' && c <= '9'; c = getchar()) x = x * 10 + c - 48;
  return x * f;
}

int inc(int a, int b) { return (a += b) >= P ? a - P : a; }
int dec(int a, int b) { return (a -= b) < 0 ? a + P : a; }
int mul(int a, int b) { return 1ll * a * b % P; }
int qpow(int a, int b) { int res = 1; for (; b; b >>= 1, a = mul(a, a)) if (b & 1) res = mul(res, a); return res; }

mt19937_64 rng(time(0));
int Rand(int l, int r) {
  return l + rng() % (r - l + 1);
}

struct Data {

  int val[3];

  Data() {
    rep(i, 0, 2) val[i] = 0;
  }

  int& operator [] (int i) {
    return val[i];
  }

  void init() {
    rep(i, 0, 2) val[i] = read();
  }

  void add_eq(Data a) {
    rep(i, 0, 2) val[i] = inc(val[i], a[i]);
  }

  void add(Data a, Data b) {
    rep(i, 0, 2) val[i] = inc(a[i], b[i]);
  }

  void clr() {
    *this = Data();
  }

  void print() {
    rep(i, 0, 2) printf("%d%c", val[i], " \n"[i == 2]);
  }

  bool empty() {
    Data e = Data();
    rep(i, 0, 2) {
      if (val[i] != e[i]) return false;
    }
    return true;
  }

} ;

struct Operation {

  int val[3][3];

  Operation() {
    rep(i, 0, 2) rep(j, 0, 2) val[i][j] = i == j;
  }

  int* operator [](int i) {
    return val[i];
  }

  void init() {
    rep(i, 0, 2) rep(j, 0, 2) val[i][j] = read();
  }

  void apply(Data &a) {
    Data res;
    rep(i, 0, 2) rep(j, 0, 2) {
      res[i] = inc(res[i], mul(val[i][j], a[j]));
    }
    a = res;
  }

  void apply(Operation &a) {
    Operation res;
    rep(i, 0, 2) res[i][i] = 0;
    rep(i, 0, 2) rep(j, 0, 2) rep(k, 0, 2) {
      res[i][j] = inc(res[i][j], mul(val[i][k], a[k][j]));
    }
    a = res;
  }

  void clr() {
    *this = Operation();
  }

  bool empty() {
    Operation e = Operation();
    rep(i, 0, 2) rep(j, 0, 2) {
      if (val[i][j] != e[i][j]) return false;
    }
    return true;
  }

  void print() {
    rep(i, 0, 2) rep(j, 0, 2) {
      cout << val[i][j] << " \n"[j == 2];
    }
  }

} ;

struct frac {
  int p, q;
  frac(int _p = 0, int _q = 1) {
    // cerr << "_p, _q = " << _p << ' ' << _q << endl;
    p = _p, q = _q;
    int g = __gcd(p, q);
    p /= g, q /= g;
    if (q < 0) p = -p, q = -q;
    // cerr << "p, q = " << p << ' ' << q << endl;
  }
  friend bool operator < (frac a, frac b) {
    return 1ll * a.p * b.q < 1ll * b.p * a.q;
  }
  friend bool operator == (frac a, frac b) {
    return 1ll * a.p * b.q == 1ll * b.p * a.q;
  }
  void print() {
    printf("%d/%d\n", p, q);
  }
} ;

struct vec {
  int x, y;
  void init() {
    x = read(), y = read();
  }
  friend bool operator < (vec a, vec b) {
    return a.x == b.x ? a.y < b.y : a.x < b.x;
  }
  void print() {
    printf("(%d, %d)\n", x, y);
  }
} ;

struct line {
  int a, b, c;
  void init() {
    a = read(), b = read(), c = -read();
  }
  bool chk(vec p) {
    return a * p.x + b * p.y + c < 0;
  }
  bool above(vec p) {
    // cout << "x, y, a, b, c = " << p.x << ' ' << p.y << ' ' << a << ' ' << b << ' ' << c << endl;
    if (b > 0) return a * p.x + b * p.y + c < 0;
    else return a * p.x + b * p.y + c > 0;
  }
  frac k() {
    return frac(-a, b);
  }
  friend bool operator < (line l1, line l2) {
    if (l1.k() == l2.k()) return frac(-l1.c, l1.b) < frac(-l2.c, l2.b);
    else return l2.k() < l1.k();
  }
} ;

frac inter(line l1, line l2) {
  return frac(l2.c * l1.b - l1.c * l2.b, l1.a * l2.b - l2.a * l1.b);
}

#define ls lson[u]
#define rs rson[u]

int tot, lson[N], rson[N];
vec p[N];
Data dat[N];
Operation laz[N];

void down(int u, Operation o) {
  o.apply(dat[u]);
  o.apply(laz[u]);
}

void pushdown(int u) {
  // cout << "pushdown u = " << u << endl;
  // rep(i, 0, 2) rep(j, 0, 2) {
    // cout << laz[u][i][j] << " \n"[j == 2];
  // }
  down(ls, laz[u]);
  down(rs, laz[u]);
  laz[u].clr();
}

void maintain(int u) {
  p[u] = p[ls];
  dat[u].add(dat[ls], dat[rs]);
}

int newnode() {
  return ++ tot;
}

void undo() {
  pushdown(tot);
  lson[tot] = rson[tot] = 0;
  p[tot] = vec();
  dat[tot].clr();
  -- tot;
}

struct O {
  int id;
  line l;
  Operation o;
} op[N];

int n, m, B, pre[N], suf[N], h[N], key[N], rk[N];

void solve(int l, int r, vector <int> c) {
  // cout << "----- solve l, r = " << l << ' ' << r << endl;
  // cout << "c : ";
  // for (auto it : c) cout << it << ' ';
  // cout << endl;
  int len = r - l + 1, cur = tot;
  auto work = [&]() {
    for (auto it : c) h[it] = 0;
    vector <int> ord;
    rep(i, l, r) ord.pb(i);
    sort(ord.begin(), ord.end(), [&](int i, int j) {
      return op[i].l < op[j].l;
    });
    // pa(ord, 0, len - 1);
    rep(i, 0, len - 1) {
      key[ord[i]] = rng() % (1 << 30);
      pre[ord[i]] = i ? pre[ord[i - 1]] : 0;
      if (op[ord[i]].l.b < 0) pre[ord[i]] ^= key[ord[i]];
      rk[ord[i]] = i;
    }
    drep(i, len - 1, 0) {
      suf[ord[i]] = i < len - 1 ? suf[ord[i + 1]] : 0;
      if (op[ord[i]].l.b > 0) suf[ord[i]] ^= key[ord[i]];
    }
    sort(c.begin(), c.end(), [&](int i, int j) {
      return p[i] < p[j];
    });
    vector <pair <frac, pii> > px;
    rep(i, 0, len - 1) rep(j, i + 1, len - 1) if (op[ord[j]].l.k() < op[ord[i]].l.k()) {
      // cout << "i, j = " << i << ' ' << j << endl;
      // auto it = inter(op[ord[i]].l, op[ord[j]].l);
      // it.print(); 
      px.pb(mp(inter(op[ord[i]].l, op[ord[j]].l), mp(ord[i], ord[j])));
    }
    px.pb(mp(frac(INF, 1), mp(0, 0)));
    sort(px.begin(), px.end(), [&](pair <frac, pii> a, pair <frac, pii> b) {
      if (a.first == b.first) {
        if (rk[a.second.first] == rk[b.second.first]) {
          return rk[a.second.second] < rk[b.second.second];
        }
        else return rk[a.second.first] < rk[b.second.first];
      }
      else return a.first < b.first;
    });
    // for (auto it : px) {
      // it.first.print();
    // }
    // pv(px.size());
    // pa(ord, 0, len - 1);
    for (int i = 0, j = 0; i < px.size(); ++ i) {
      // pv(i);
      // px[i].first.print();
      for (; j < c.size() && p[c[j]].x < px[i].first; ++ j) {
        // cout << "ord : ";
        // for (auto it : ord) cout << it << ' ';
        // cout << endl;
        auto it = partition_point(ord.begin(), ord.end(), [&](int k) {
          return !op[k].l.above(p[c[j]]);
        });
        // cout << "i, j = " << i << ' ' << j << endl;
        // pv(c[j]);
        // rep(k, 0, len - 1) {
          // cout << "k, ord[k] = " << k << ' ' << ord[k] << endl;
          // pv(op[ord[k]].l.above(p[c[j]]));
        // }
        if (it != ord.end()) h[c[j]] ^= suf[*it];
        if (it != ord.begin()) h[c[j]] ^= pre[*(-- it)];
      }
      // pa(ord, 0, len - 1);
      int u = px[i].second.first, v = px[i].second.second;
      // cout << "u, v = " << u << ' ' << v << endl;
      if (!u && !v) continue;
      assert(rk[u] + 1 == rk[v]);
      swap(ord[rk[u]], ord[rk[v]]);
      swap(rk[u], rk[v]);
      if (op[u].l.b < 0) pre[v] ^= key[u];
      else suf[v] ^= key[u];
      if (op[v].l.b < 0) pre[u] ^= key[v];
      else suf[u] ^= key[v];
      // pa(pre, 1, m);
      // pa(suf, 1, m);
      // px[i].first.print();
      // pa(ord, 0, len - 1);
    }
    sort(c.begin(), c.end(), [&](int i, int j) {
      return h[i] < h[j];
    });
    vector <int> nc;
    for (int i = 0, j; i < c.size(); i = j + 1) {
      for (j = i; j + 1 < c.size() && h[c[j + 1]] == h[c[i]]; ++ j) ;
      if (i < j) {
        rep(k, i + 1, j) {
          int u = newnode();
          ls = k == i + 1 ? c[i] : u - 1, rs = c[k];
          maintain(u);
          // pv(u);
          // pv(ls);
          // pv(rs);
          // pa(dat[u], 0, 2);
          // pa(dat[ls], 0, 2);
          // pa(dat[rs], 0, 2);
        }
        nc.pb(tot);
      }
      else nc.pb(c[i]);
    }
    // pa(key, 1, m);
    // pa(h, 1, n);
    c = nc;
  } ;
  work();
  // cout << "work done.\n";
  // cout << "c : ";
  // for (auto it : c) cout << it << ' ';
  // cout << endl;
  if (l == r) {
    bool flag = false;
    for (auto it : c) {
      if (op[l].l.chk(p[it])) {
        // pv(it);
        // p[it].print();
        dat[it].print();
        down(it, op[l].o);
        flag = true;
        break;
      }
    }
    if (!flag) printf("0 0 0\n");
    while (tot > cur) undo();
    return;
  }
  int mid = (l + r) >> 1;
  solve(l, mid, c);
  solve(mid + 1, r, c);
  // cout << "tot, cur = " << tot << ' ' << cur << endl;
  while (tot > cur) undo();
}

#undef ls
#undef rs

int main() {
  n = read(), tot = n;
  rep(i, 1, n) p[i].init(), dat[i].init();
  m = read(), B = m;
  rep(i, 1, m) op[i].l.init(), op[i].o.init(), op[i].id = i;
  // rep(u, 1, n) {
  //   rep(i, 0, 2) rep(j, 0, 2) {
  //     cout << laz[u][i][j] << " \n"[j == 2];
  //   }
  // }
  for (int l = 1, r; l <= m; l = r + 1) {
    r = min(l + B - 1, m);
    // cout << "l, r = " << l << ' ' << r << endl;
    vector <int> all;
    rep(i, 1, n) all.pb(i);
    solve(l, r, all);
    // pv(tot);
    // rep(i, 1, n) {
    //   pa(dat[i], 0, 2);
    // }
  }
  return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 8ms
memory: 62336kb

input:

5
1 1 2 3 4
12 12 4 6 1
1 12 5 1 2
12 1 1 5 5
6 6 2 0 3
3
1 1 4 1 1 2 3 4 5 2 3 4
1 1 400 1 3 4 2 1 2 3 4 5
-1 -1 -10 3 2 1 4 6 5 4 3 2

output:

2 3 4
25 50 40
92 58 139

result:

ok 3 lines

Test #2:

score: 0
Accepted
time: 8ms
memory: 62328kb

input:

8
-509 1134 869419079 764178960 818736647
-2836 296 965929020 482991943 829626659
1594 -1045 289612318 572608619 474362463
-2946 -165 85255903 285022572 770151631
-74 -131 732523347 283776652 211209006
-627 -604 539714672 763810142 817996815
-1187 -1219 734874008 764773559 261445054
-18 226 31476550...

output:

242481509 621755738 615459217
984440526 242571329 417013116
122667367 215125161 518083968
594780462 21825000 214574293

result:

ok 4 lines

Test #3:

score: -100
Wrong Answer
time: 481ms
memory: 70792kb

input:

30000
676 -1234 836467424 502287177 140023561
-2003 -54 939673593 585085650 422504901
14185 -49892 469301115 424738168 942143157
-6019 4933 573698653 956514739 385606216
-1097 -1767 918532462 279450765 873950517
-2732 5210 428418604 607751438 2805137
-2791 1240 250817926 463999452 951276698
-3460 -5...

output:

760460183 994726576 161451626
224933572 84835407 269325860
442585365 946639191 152848161
309217862 352168103 288017696
752778987 492158639 136569234
608262610 265549336 486167331
832917758 314259493 851554086
394032024 381712644 999703323
126471572 858577585 766717427
521052596 836987848 425340503
7...

result:

wrong answer 1st lines differ - expected: '538200103 176562537 786040129', found: '760460183 994726576 161451626'