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#include <bits/stdc++.h> using namespace std; const int INF = 2e9; const int maxn = 2002; vector<pair<int, int>> v; int dp[maxn]; int rec(int at) { if(dp[at] != -1) { return dp[at]; } int res = 1; for(int i = at + 1; i < v.size(); i++) { if(v[at].second <= v[i].second) { res = max(res, rec(i) + 1); } } return dp[at] = res; } int main() { ios_base::sync_with_stdio(false); int t; cin >> t; while(t--) { v.clear(); int n; cin >> n; vector<int> a(n), b(n); for(int i = 0; i < n; i++) { cin >> a[i]; } for(int i = 0; i < n; i++) { cin >> b[i]; v.push_back(make_pair(a[i], b[i])); } sort(v.begin(), v.end()); memset(dp, -1, sizeof dp); int res = 0; for(int i = 0; i < n; i++) { res = max(res, rec(i)); } cout << res << endl; } return 0; }
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