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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 |
---|---|---|---|---|---|---|---|---|---|
#627083 | #5668. Cell Nuclei Detection | KowerKoint# | AC ✓ | 4265ms | 52292kb | C++20 | 3.6kb | 2024-10-10 14:41:04 | 2024-10-10 14:41:04 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
template <class T>
using V = vector<T>;
template <class T>
using VV = vector<vector<T>>;
struct E {
int to, rev, cap;
};
template <class C>
struct MaxFlow {
C flow;
V<char> dual;
};
template<class C, class E>
struct MFExec {
static constexpr C INF = numeric_limits<C>::max();
C eps;
VV<E>& g;
int s, t;
V<int> level, iter;
C dfs(int v, C f) {
if(v == t) return f;
C res = 0;
for(int& i = iter[v]; i < int(g[v].size()); i++) {
E& e = g[v][i];
if(e.cap <= eps || level[v] >= level[e.to]) continue;
C d = dfs(e.to, min(f, e.cap));
e.cap -= d;
g[e.to][e.rev].cap += d;
res += d;
f -= d;
if(f == 0) break;
}
return res;
}
MaxFlow<C> info;
MFExec(VV<E>& _g, int _s, int _t, C _eps) : eps(_eps), g(_g), s(_s), t(_t) {
int N = int(g.size());
C& flow = (info.flow = 0);
while(true) {
queue<int> que;
level = V<int>(N, -1);
level[s] = 0;
que.push(s);
while(!que.empty()) {
int v = que.front(); que.pop();
for(E e : g[v]) {
if(e.cap <= eps || level[e.to] >= 0) continue;
level[e.to] = level[v] + 1;
que.push(e.to);
}
}
if(level[t] == -1) break;
iter = V<int>(N, 0);
while(true) {
C f = dfs(s, INF);
if(!f) break;
flow += f;
}
}
for(int i = 0; i < N; i++) info.dual.push_back(level[i] == -1);
}
};
template <class C, class E>
MaxFlow<C> get_mf(VV<E>& g, int s, int t, C eps) {
return MFExec<C, E>(g, s, t, eps).info;
}
void solve() {
int m, n; cin >> m>> n;
vector<tuple<int, int, int, int>> t(m);
for(int i = 0; i < m; i++) {
int x1, y1, x2, y2; cin >> x1 >> y1 >> x2 >> y2;
t[i] = {x1, y1, x2, y2};
}
vector<tuple<int, int, int, int>> d(n);
map<tuple<int, int, int, int>, int> rd;
for(int i = 0; i < n; i++) {
int x1, y1, x2, y2; cin >> x1 >> y1 >> x2 >> y2;
d[i] = {x1, y1, x2, y2};
rd[d[i]] = i;
}
VV<E> g(m+n+2);
auto add_edge = [&](int from, int to, int cap) {
g[from].push_back(E{to, int(g[to].size()), cap});
g[to].push_back(E{from, int(g[from].size())-1, 0});
};
for(int i = 0; i < m; i++) {
auto [x1, y1, x2, y2] = t[i];
if(x2 > x1+8) continue;
if(y2 > y1+8) continue;
for(int lx = x1-4; lx <= x2; lx++) {
for(int rx= lx+1; rx <= lx+4; rx++) {
for(int ly = y1-4; ly <= y2; ly++) {
for(int ry = ly+1; ry <= ly+4; ry++) {
int dx = min(x2, rx) - max(x1, lx);
int dy = min(y2, ry) - max(y1, ly);
if(dx < 0 || dy < 0) continue;
if(dx*dy*2 >= (x2-x1)*(y2-y1)) {
if(rd.count({lx, ly, rx, ry})) {
add_edge(i, m+rd[{lx, ly, rx, ry}], 1);
}
}
}
}
}
}
}
for(int i = 0; i < m; i++) add_edge(m+n, i, 1);
for(int i = 0; i < n; i++) add_edge(m+i, m+n+1, 1);
cout << get_mf(g, m+n, m+n+1, 0).flow << '\n';
}
int main() {
int t; cin >> t;
while(t--) solve();
}
详细
Test #1:
score: 100
Accepted
time: 1ms
memory: 3592kb
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: 3520kb
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: 2760ms
memory: 33928kb
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: 1151ms
memory: 52292kb
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: 1216ms
memory: 16664kb
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: 4265ms
memory: 34292kb
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: 0ms
memory: 3768kb
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'