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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#548999#5668. Cell Nuclei Detectionskrghariapa#WA 571ms7680kbC++143.6kb2024-09-05 23:10:432024-09-05 23:10:44

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  • [2024-09-05 23:10:44]
  • 评测
  • 测评结果:WA
  • 用时:571ms
  • 内存:7680kb
  • [2024-09-05 23:10:43]
  • 提交

answer

#include <bits/stdc++.h>
#define NIL 0
#define INF INT_MAX
using namespace std;

class BipartiteMatching {
  int U, V;
  vector<vector<int>> adj;
  vector<int> pairU, pairV, dist;

public:
  BipartiteMatching(int U, int V) {
    this->U = U;
    this->V = V;
    adj.resize(U + 1);
    pairU.resize(U + 1, NIL);
    pairV.resize(V + 1, NIL);
    dist.resize(U + 1, INF);
  }

  void addEdge(int u, int v) {
    adj[u].push_back(v);
  }

  bool bfs() {
    queue<int> q;

    for (int u = 1; u <= U; u++) {
      if (pairU[u] == NIL) {
        dist[u] = 0;
        q.push(u);
      } else {
        dist[u] = INF;
      }
    }
    dist[NIL] = INF;

    while (!q.empty()) {
      int u = q.front();
      q.pop();

      if (dist[u] < dist[NIL]) {
        for (int v : adj[u]) {
          if (dist[pairV[v]] == INF) {
            dist[pairV[v]] = dist[u] + 1;
            q.push(pairV[v]);
          }
        }
      }
    }
    return dist[NIL] != INF;
  }

  bool dfs(int u) {
    if (u != NIL) {
      for (int v : adj[u]) {
        if (dist[pairV[v]] == dist[u] + 1 && dfs(pairV[v])) {
          pairV[v] = u;
          pairU[u] = v;
          return true;
        }
      }
      dist[u] = INF;
      return false;
    }
    return true;
  }

  int hopcroftKarp() {
    int matching = 0;

    while (bfs()) {
      for (int u = 1; u <= U; u++) {
        if (pairU[u] == NIL && dfs(u)) {
          matching++;
        }
      }
    }
    return matching;
  }
};

int areaIntersect(array<int, 4> p1, array<int, 4> p2) {
  int x_overlap = max(0, min(p1[2], p2[2]) - max(p1[0], p2[0]));
  int y_overlap = max(0, min(p1[3], p2[3]) - max(p1[1], p2[1]));
  return x_overlap * y_overlap;
}

int area(array<int, 4> p) {
  int x = p[2] - p[0];
  int y = p[3] - p[1];
  return x * y;
}

void solve() {
  int m, n;
  cin >> m >> n;
  BipartiteMatching bm(m, n);
  vector<array<int, 4>> base, target;
  map<pair<float, float>, int> mp;

  for (int i = 0; i < m; i++) {
    int a, b, c, d;
    cin >> a >> b >> c >> d;
    base.push_back({a, b, c, d});
  }

  for (int i = 0; i < n; i++) {
    int a, b, c, d;
    cin >> a >> b >> c >> d;
    target.push_back({a, b, c, d});
    float midx = (float) (a + c)/ (float) 2.0;
    float midy = (float) (b + d)/ (float) 2.0;
    mp[{midx, midx}] = i;
  }

  for (int i = 0; i < m; i++) {
    float midx = (float) (base[i][0] + base[i][2]) / (float) 2.0;
    float midy = (float) (base[i][1] + base[i][3]) / (float) 2.0;

    for (float j = 0; j <= 2.0; j += 0.5) {
      for (float k = 0; k <= 2.0; k += 0.5) {
        if (mp.find({midx + j, midy + k}) != mp.end() && area(base[i]) <= 2 * areaIntersect(base[i], target[mp[{midx + j, midy + k}]])) {
          bm.addEdge(i + 1, mp[{midx + j, midy + k}] + 1);
        }

        if (mp.find({midx + j, midy - k}) != mp.end() && area(base[i]) <= 2 * areaIntersect(base[i], target[mp[{midx + j, midy - k}]])) {
          bm.addEdge(i + 1, mp[{midx + j, midy - k}] + 1);
        }

        if (mp.find({midx - j, midy + k}) != mp.end() && area(base[i]) <= 2 * areaIntersect(base[i], target[mp[{midx - j, midy + k}]])) {
          bm.addEdge(i + 1, mp[{midx - j, midy + k}] + 1);
        }

        if (mp.find({midx - j, midy - k}) != mp.end() && area(base[i]) <= 2 * areaIntersect(base[i], target[mp[{midx - j, midy - k}]])) {
          bm.addEdge(i + 1, mp[{midx - j, midy - k}] + 1);
        }
      }
    }
  }

  int res = bm.hopcroftKarp();
  cout << res << '\n';
}

int main() {
  int t = 1;
  cin >> t;
  while (t--) {
    solve();
  }
}

Details

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Test #1:

score: 100
Accepted
time: 0ms
memory: 3596kb

input:

3
2 2
1 1 3 3
3 3 5 5
2 2 4 4
4 4 6 6
2 3
1 1 3 3
3 3 5 5
1 3 3 5
2 1 4 5
3 1 5 3
3 3
1 1 2 2
2 2 3 3
3 3 4 4
1 1 3 3
2 2 4 4
3 3 5 5

output:

0
1
3

result:

ok 3 lines

Test #2:

score: 0
Accepted
time: 0ms
memory: 3624kb

input:

3
2 2
1 1 3 3
3 3 5 5
2 2 4 4
4 4 6 6
2 3
1 1 3 3
3 3 5 5
1 3 3 5
2 1 4 5
3 1 5 3
3 3
1 1 2 2
2 2 3 3
3 3 4 4
1 1 3 3
2 2 4 4
3 3 5 5

output:

0
1
3

result:

ok 3 lines

Test #3:

score: -100
Wrong Answer
time: 571ms
memory: 7680kb

input:

5
50000 50000
0 0 4 4
4 0 8 4
8 0 12 4
12 0 16 4
16 0 20 4
20 0 24 4
24 0 28 4
28 0 32 4
32 0 36 4
36 0 40 4
40 0 44 4
44 0 48 4
48 0 52 4
52 0 56 4
56 0 60 4
60 0 64 4
64 0 68 4
68 0 72 4
72 0 76 4
76 0 80 4
80 0 84 4
84 0 88 4
88 0 92 4
92 0 96 4
96 0 100 4
100 0 104 4
104 0 108 4
108 0 112 4
112 ...

output:

0
0
0
0
0

result:

wrong answer 1st lines differ - expected: '50000', found: '0'