#pragma GCC optimize ("O2") #pragma GCC optimize ("unroll-loops") #include <bits/stdc++.h> using namespace std; typedef long long ll; #define sz(x) (int)x.size() #define all(x) x.begin() , x.end() bool dfs(int a, int L, vector<vector<int>>& g, vector<int>& btoa, vector<int>& A, vector<int>& B) { if (A[a] != L) return 0; A[a] = -1; for (int b : g[a]) if (B[b] == L + 1) { B[b] = 0; if (btoa[b] == -1 || dfs(btoa[b], L + 1, g, btoa, A, B)) return btoa[b] = a, 1; } return 0; } int hopcroftKarp(vector<vector<int>>& g, vector<int>& btoa) { int res = 0; vector<int> A(g.size()), B(btoa.size()), cur, next; for (;;) { fill(all(A), 0); fill(all(B), 0); /// Find the starting nodes for BFS (i.e. layer 0). cur.clear(); for (int a : btoa) if(a != -1) A[a] = -1; for(int a = 0;a<sz(g);a++) if(A[a] == 0) cur.push_back(a); /// Find all layers using bfs. for (int lay = 1;; lay++) { bool islast = 0; next.clear(); for (int a : cur) for (int b : g[a]) { if (btoa[b] == -1) { B[b] = lay; islast = 1; } else if (btoa[b] != a && !B[b]) { B[b] = lay; next.push_back(btoa[b]); } } if (islast) break; if (next.empty()) return res; for (int a : next) A[a] = lay; cur.swap(next); } /// Use DFS to scan for augmenting paths. for(int a = 0;a<sz(g);a++) res += dfs(a, 0, g, btoa, A, B); } } void solve(){ int n,m; cin >> n >> m; pair<int,int>arr[m];// time konum for(int i = 0;i<m;i++)cin >> arr[i].first; for(int i = 0;i<m;i++)cin >> arr[i].second; sort(arr , arr + m); vector<vector<int>>graph(m); for(int i = 0;i<m;i++){ for(int j = i+1;j<m;j++){ if(abs(arr[i].second - arr[j].second) <= abs(arr[i].first - arr[j].first)){ graph[i].push_back(j); } } } vector<int>wtf(m,-1); cout << m - hopcroftKarp(graph , wtf) << endl; } signed main(){ ios_base::sync_with_stdio(0);cin.tie(0); int testcase=1;//cin >> testcase; while(testcase--)solve(); cerr << 1000.0 * clock() / CLOCKS_PER_SEC << " ms" << endl; }