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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. #define int long long
  4. vector<int> adj[1000];
  5. int dp[1000];
  6. int rec(int i) {
  7. 	if (dp[i] != -1) return dp[i];
  8. 	int cur = 1;
  9. 	for (int j : adj[i]) {
  10. 		cur = max(cur, 1 + rec(j));
  11. 	}
  12. 	return dp[i] = cur;
  13. }
  14. signed main() {
  15. 	ios_base :: sync_with_stdio(0); cin.tie(0); cout.tie(0);
  16. 	int n, k; cin >> n >> k;
  17. 	vector<vector<int>> a(k, vector<int>(n)), pos(k, vector<int>(n));
  18. 	for (int i = 0; i < k; i++) {
  19. 		for (int j = 0; j < n; j++) {
  20. 			cin >> a[i][j];
  21. 			a[i][j]--;
  22. 			pos[i][a[i][j]] = j;
  23. 		}
  24. 	}
  25. 	for (int i = 0; i < n; i++) {
  26. 		for (int j = 0; j < n; j++) {
  27. 			int ok = 1;
  28. 			for (int x = 0; x < k; x++) {
  29. 				ok &= (pos[x][i] < pos[x][j]);
  30. 			}
  31. 			if (ok) {
  32. 				adj[i].push_back(j);
  33. 			}
  34. 		}
  35. 	}
  36. 	for (int i = 0; i < n; i++) dp[i] = -1;
  37. 	int ans = 0;
  38. 	for (int i = 0; i < n; i++) {
  39. 		ans = max(ans, rec(i));
  40. 	}
  41. 	cout << ans << '\n';
  42. }
Success #stdin #stdout 0.01s 5440KB
comments (?)
stdin 
4 
3
1 3 2 4
1 3 2 4
1 4 3 2
stdout 
3
https://ideone.com/iLQvgv
language:
C++14 (gcc 8.3)
created:
3 years ago
visibility:
public

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