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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 |
---|---|---|---|---|---|---|---|---|---|
#658533 | #5668. Cell Nuclei Detection | ucup-team5226# | AC ✓ | 319ms | 44672kb | C++20 | 4.6kb | 2024-10-19 16:59:54 | 2024-10-19 17:00:00 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vl = vector<ll>;
using str = string;
#define reps(i, a, n) for (ll i = (a); i < ll(n); i++)
#define rep(i, n) reps(i, 0, n)
bool chmin(ll& a, ll b) {
if (a > b) {
a = b;
return true;
}
return false;
}
template <class Cap>
struct mf_graph {
public:
explicit mf_graph(int n) : _n(n), g(n) {}
int add_edge(int from, int to, Cap cap) {
assert(0 <= from and from < _n);
assert(0 <= to and to < _n);
assert(0 <= cap);
int m = int(pos.size());
pos.push_back({from, int(g[from].size())});
g[from].push_back(_edge{to, int(g[to].size()), cap});
g[to].push_back(_edge{from, int(g[from].size()) - 1, 0});
return m;
}
struct edge {
int from, to;
Cap cap, flow;
};
Cap flow(int s, int t, Cap flow_limit = std::numeric_limits<Cap>::max()) {
assert(0 <= s and s < _n);
assert(0 <= t and t < _n);
assert(s != t);
std::vector<int> level(_n), iter(_n);
auto bfs = [&]() {
std::fill(level.begin(), level.end(), -1);
level[s] = 0;
std::queue<int> que;
que.push(s);
while (!que.empty()) {
int v = que.front();
que.pop();
for (auto e : g[v]) {
if (e.cap == 0 or level[e.to] >= 0) continue;
level[e.to] = level[v] + 1;
if (e.to == t) return;
que.push(e.to);
}
}
};
auto dfs = [&](auto&& dfs, int v, Cap up) -> Cap {
if (v == s) return up;
Cap res = 0;
int lv = level[v];
for (int& i = iter[v]; i < int(g[v].size()); i++) {
_edge& e = g[v][i];
if (lv <= level[e.to] or g[e.to][e.rev].cap == 0) continue;
Cap d = dfs(dfs, e.to, std::min(up - res, g[e.to][e.rev].cap));
if (d <= 0) continue;
e.cap += d;
g[e.to][e.rev].cap -= d;
res += d;
if (res == up) return res;
}
level[v] = _n;
return res;
};
Cap flow = 0;
while (flow < flow_limit) {
bfs();
if (level[t] == -1) break;
std::fill(iter.begin(), iter.end(), 0);
Cap f;
while ((f = dfs(dfs, t, flow_limit - flow)) > 0) {
flow += f;
}
}
return flow;
}
private:
int _n;
struct _edge {
int to, rev;
Cap cap;
};
std::vector<std::pair<int, int>> pos;
std::vector<std::vector<_edge>> g;
};
void solve() {
int m, n;
cin >> m >> n;
struct Pos2D {
int x1, y1, x2, y2;
};
vector<vector<int>> posb(2001, vector<int>(2001, -1));
vector<Pos2D> a(m), b(n);
for (int i = 0; i < m; i++) {
int x1, y1, x2, y2;
cin >> x1 >> y1 >> x2 >> y2;
a[i] = {x1, y1, x2, y2};
}
for (int i = 0; i < n; i++) {
int x1, y1, x2, y2;
cin >> x1 >> y1 >> x2 >> y2;
b[i] = {x1, y1, x2, y2};
for (int x = x1; x < x2; x++)
for (int y = y1; y < y2; y++) posb[x][y] = i;
}
mf_graph<ll> mf(n + m + 2);
ll S = 0, T = n + m + 1;
for (int i = 0; i < m; i++) mf.add_edge(S, i + 1, 1);
for (int i = 0; i < n; i++) mf.add_edge(i + 1 + m, T, 1);
vector<int> used(n);
for (int i = 0; i < m; i++) {
for (int x = a[i].x1; x <= a[i].x2; x++) {
for (int y = a[i].y1; y <= a[i].y2; y++) {
if (posb[x][y] == -1) continue;
int id = posb[x][y];
if (used[id]) continue;
used[id] = 1;
int lx = max(a[i].x1, b[id].x1), rx = min(a[i].x2, b[id].x2);
int ly = max(a[i].y1, b[id].y1), ry = min(a[i].y2, b[id].y2);
if (lx > rx or ly > ry) continue;
int area = (a[i].x2 - a[i].x1) * (a[i].y2 - a[i].y1);
if (2 * (rx - lx) * (ry - ly) >= area)
mf.add_edge(i + 1, id + 1 + m, 1);
}
}
for (int x = a[i].x1; x <= a[i].x2; x++) {
for (int y = a[i].y1; y <= a[i].y2; y++) {
if (posb[x][y] == -1) continue;
used[posb[x][y]] = 0;
}
}
}
cout << mf.flow(S, T) << endl;
}
int main() {
ll t = 1;
cin >> t;
rep(i, t) solve();
}
詳細信息
Test #1:
score: 100
Accepted
time: 4ms
memory: 18968kb
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: 19056kb
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: 0
Accepted
time: 310ms
memory: 43020kb
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:
50000 50000 0 50000 3150
result:
ok 5 lines
Test #4:
score: 0
Accepted
time: 281ms
memory: 32060kb
input:
5 50000 50000 0 0 1 1 1 0 2 1 2 0 3 1 3 0 4 1 4 0 5 1 5 0 6 1 6 0 7 1 7 0 8 1 8 0 9 1 9 0 10 1 10 0 11 1 11 0 12 1 12 0 13 1 13 0 14 1 14 0 15 1 15 0 16 1 16 0 17 1 17 0 18 1 18 0 19 1 19 0 20 1 20 0 21 1 21 0 22 1 22 0 23 1 23 0 24 1 24 0 25 1 25 0 26 1 26 0 27 1 27 0 28 1 28 0 29 1 29 0 30 1 30 0 ...
output:
50000 25050 12500 16000 8000
result:
ok 5 lines
Test #5:
score: 0
Accepted
time: 313ms
memory: 31904kb
input:
5 50000 50000 0 0 2 4 4 0 7 1 8 0 10 1 12 0 15 3 16 0 19 1 20 0 22 2 24 0 26 4 28 0 30 4 32 0 36 3 36 0 40 1 40 0 44 1 44 0 47 2 48 0 49 3 52 0 54 1 56 0 59 4 60 0 64 3 64 0 68 3 68 0 70 1 72 0 76 4 76 0 80 3 80 0 84 4 84 0 87 2 88 0 90 1 92 0 94 4 96 0 98 1 100 0 104 1 104 0 107 2 108 0 110 4 112 0...
output:
10594 10779 10618 10381 10779
result:
ok 5 lines
Test #6:
score: 0
Accepted
time: 319ms
memory: 44672kb
input:
5 50000 50000 0 0 4 4 1 0 5 4 2 0 6 4 3 0 7 4 4 0 8 4 5 0 9 4 6 0 10 4 7 0 11 4 8 0 12 4 9 0 13 4 10 0 14 4 11 0 15 4 12 0 16 4 13 0 17 4 14 0 18 4 15 0 19 4 16 0 20 4 17 0 21 4 18 0 22 4 19 0 23 4 20 0 24 4 21 0 25 4 22 0 26 4 23 0 27 4 24 0 28 4 25 0 29 4 26 0 30 4 27 0 31 4 28 0 32 4 29 0 33 4 30...
output:
50000 50000 50000 50000 49600
result:
ok 5 lines
Test #7:
score: 0
Accepted
time: 6ms
memory: 18896kb
input:
1 4 4 1 1 3 3 2 1 4 3 1 2 3 4 2 2 4 4 2 1 4 3 3 2 5 4 1 2 3 4 2 3 4 5
output:
3
result:
ok single line: '3'