Submission #952399

#	Time	Username	Problem	Language	Result	Execution time	Memory
952399		Minbaev	Magic Tree (CEOI19_magictree)	C++17	0 / 100	24 ms	3288 KiB

magictree

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace __gnu_pbds;
using namespace std;

#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define f first
#define int long long
#define s second
#define pii pair<int,int>

template<class T>bool umax(T &a,T b){if(a<b){a=b;return true;}return false;}
template<class T>bool umin(T &a,T b){if(b<a){a=b;return true;}return false;}
typedef tree<int, null_type, less_equal<int>, rb_tree_tag,
	tree_order_statistics_node_update> ordered_set;
	
const int N = 1e6 + 5;
const int inf = 1e17 + 7;
const int mod = 1e9 + 7;

int n,m,k;
vector<int>ans,a;

void solve(){
	
	cin >> n >> m >> k;
	
	for(int i = 2;i<=n;i++){
		int b;
		cin >> b;
	}
	vector<int>g(n+1);
	for(int i = 0;i<m;i++){
		int b,c,d;
		cin >> b >> c >> d;
		g[b] = c;
	}
	
	for(int i = 1;i<=n;i++){
		if(g[i] == 0)continue;
		a.pb(-g[i]);
	}
	
	for(int i = 0;i<a.size();i++){
		
		if(ans.size() > 0 && a[i] == ans[ans.size()-1]){
			ans.pb(a[i]);
			continue;
		}
		
		int l = 0, r = ans.size()-1, as = -1;
		
		while(l<=r){
			int mid = (l+r)/2;
			if(ans[mid]<=a[i])r = mid - 1;
			else{
				l = mid + 1;
				as = mid;
			}
		}
		
		if(as != -1){
			ans[as] = a[i];
		}
		else ans.pb(a[i]);
	}
	
	cout << ans.size()<<"\n";
	//~ for(auto to:ans)cout << -to << " ";
	
	
	
	
}
/*
6 6 2
1
2
3
4
5
1 1 1
2 2 2
3 3 1
4 4 2
5 5 2
6 6 1
// Success consists of going from failure to failure without loss of enthusiasm
// Problems means that you are trying
// Soberis dolboyeb
*/
signed main()
{
	
//	freopen("seq.in", "r", stdin);
//  freopen("seq.out", "w", stdout);
	ios_base::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL);
	int tt=1;//cin>>tt;
	while(tt--)solve();

}

Compilation message (stderr)

magictree.cpp: In function 'void solve()':
magictree.cpp:48:17: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |  for(int i = 0;i<a.size();i++){
      |                ~^~~~~~~~~

• Subtask 1: 0 / 6
• Subtask 2: 0 / 3
• Subtask 3: 0 / 11
• Subtask 4: 0 / 12
• Subtask 5: 0 / 16
• Subtask 6: 0 / 13
• Subtask 7: 0 / 22
• Subtask 8: 0 / 17