diff --git a/S2OJ/1494/1494.cpp b/S2OJ/1494/1494.cpp new file mode 100644 index 00000000..8a6663c0 --- /dev/null +++ b/S2OJ/1494/1494.cpp @@ -0,0 +1,134 @@ +#include +#include +#include +#include +#include +#include + +using std::cin; +using std::cout; +const char endl = '\n'; + +const int N = 1e6 + 5; + +int n, s, t, f[N], ans; +std::tuple points[N]; +int idx, head[N << 1], ver[N << 2], edge[N << 2], next[N << 2]; +int cur[N << 1], dist[N << 1]; + +void add(int u, int v, int w) { + next[idx] = head[u]; + ver[idx] = v; + edge[idx] = w; + head[u] = idx++; +} + +bool bfs() { + std::fill_n(dist, N << 1, 0); + + std::queue q; + + q.push(s); + dist[s] = 1; + cur[s] = head[s]; + + while (!q.empty()) { + int u = q.front(); + q.pop(); + + for (int i = head[u]; ~i; i = next[i]) { + int v = ver[i], + w = edge[i]; + + if (w && !dist[v]) { + dist[v] = dist[u] + 1; + cur[v] = head[v]; + if (v == t) return true; + q.push(v); + } + } + } + return false; +} + +int dinic(int u, int limit) { + if (u == t) return limit; + + int flow = 0; + + for (int i = cur[u]; ~i && flow < limit; i = next[i]) { + cur[u] = i; + + int v = ver[i], + w = edge[i]; + + if (dist[v] == dist[u] + 1 && w) { + int k = dinic(v, std::min(w, limit - flow)); + + if (!k) { + dist[v] = 0; + } else { + flow += k; + edge[i] -= k; + edge[i ^ 1] += k; + } + } + } + + return flow; +} + +int main() { + std::ios::sync_with_stdio(false); + cin.tie(nullptr); + + std::fill_n(head, N << 1, -1); + + cin >> n; + + for (int i = 1; i <= n; i++) { + cin >> std::get<0>(points[i]) >> std::get<1>(points[i]) >> std::get<2>(points[i]); + } + + std::sort(points + 1, points + 1 + n); + + for (int i = 1; i <= n; i++) { + f[i] = 1; + + for (int j = 1; j < i; j++) { + int x1, y1, z1, + x2, y2, z2; + + std::tie(x1, y1, z1) = points[i]; + std::tie(x2, y2, z2) = points[j]; + + if (x2 < x1 && y2 < y1 && z2 < z1) { + f[i] = std::max(f[i], f[j] + 1); + + add(j, i + n, 1); + add(i + n, j, 0); + } + } + + ans = std::max(ans, f[i]); + } + + s = n * 2 + 1, t = s + 1; + for (int i = 1; i <= n; i++) { + add(s, i, 1); + add(i, s, 0); + + add(i + n, t, 1); + add(t, i + n, 0); + } + + int res = 0, flow; + while (bfs()) { + while (flow = dinic(s, std::numeric_limits::max())) res += flow; + } + + cout << ans << endl + << n - res << endl; + + return 0; +} diff --git a/S2OJ/1494/data/data1.in b/S2OJ/1494/data/data1.in new file mode 100644 index 00000000..5e3cfe1f --- /dev/null +++ b/S2OJ/1494/data/data1.in @@ -0,0 +1,3 @@ +version https://git-lfs.github.com/spec/v1 +oid sha256:fe2b0419d46bccf6f9c438f9b92e5c81536ac8545f3e1a593f5ff8e0c81acdbd +size 208 diff --git a/S2OJ/1494/data/data1.out b/S2OJ/1494/data/data1.out new file mode 100644 index 00000000..44046801 --- /dev/null +++ b/S2OJ/1494/data/data1.out @@ -0,0 +1,3 @@ +version https://git-lfs.github.com/spec/v1 +oid sha256:56c47cb32092661c2f3438298862e0759fa78694dbe78060f6369502f4386a09 +size 4 diff --git a/S2OJ/1494/data/data10.in b/S2OJ/1494/data/data10.in new file mode 100644 index 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