제출 #895824

#제출 시각아이디문제언어결과실행 시간메모리
895824tvladm2009Exam (eJOI20_exam)C++17
65 / 100
78 ms123172 KiB
#include <bits/stdc++.h> using namespace std; typedef long long ll; const int N = 5e3 + 7; int a[N], b[N]; bool ok[N][N]; int dp[N][N]; int main() { ios::sync_with_stdio(false); cin.tie(0); int n; cin >> n; for (int i = 0; i < n; i++) cin >> a[i]; for (int i = 0; i < n; i++) cin >> b[i]; for (int i = 0; i < n; i++) { ok[i][i] = true; for (int j = i - 1; j >= 0; j--) { if (a[j] > a[i]) break; ok[j][i] = true; } for (int j = i + 1; j < n; j++) { if (a[j] > a[i]) break; ok[j][i] = true; } } for (int i = 0; i < n; i++) { if (ok[0][i] && b[0] == a[i]) { dp[0][i] = 1; } } for (int i = 1; i < n; i++) { int mx = 0; for (int j = 0; j < n; j++) { mx = max(mx, dp[i - 1][j]); if (ok[i][j]) { dp[i][j] = mx; if (b[i] == a[j]) ++dp[i][j]; } } } int ans = 0; for (int i = 0; i < n; i++) ans = max(ans, dp[n - 1][i]); cout << ans << endl; return 0; }
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