Submission #1054975

#	Time	Username	Problem	Language	Result	Execution time	Memory
1054975		thelegendary08	Bouquet (EGOI24_bouquet)	C++14	100 / 100	52 ms	24664 KiB

Main

#include<bits/stdc++.h>
#define pb push_back
#define int long long
#define vi vector<int>
#define vvi vector<vector<int>>
#define vll vector<long long int>
#define vvll vector<vector<long long int>>
#define pii pair<int, int>
#define vpii vector<pair<int, int>>
#define vc vector<char>
#define vvc vector<vector<char>>
#define vb vector<bool>
#define mii map<int,int>
#define mll map<long long int, long long int>
#define mivi map<int,vector<int>>
#define f0r(i,n) for(int i=0;i<n;i++)
#define FOR(i,k,n) for(int i=k;i<n;i++)
using namespace std;
const int mxn = 1005;
vi adj[mxn];
signed main(){
	ios::sync_with_stdio(false);
	cin.tie(NULL);
	//ifstream cin(".in");
	//ofstream cout(".out");
	int n;
	cin>>n;
	vi l(n);
	vi r(n);
	f0r(i, n)cin>>l[i]>>r[i];
	int dp[n];
	dp[0] = 1;
	vi b(n+1, 4e18);
	b[0] = -1;
	//b[1] = 0;
	vi todo[2*n+5];
	
	todo[r[0] + 1].pb(0);
	FOR(i, 1, n){
		for(auto u : todo[i])b[dp[u]] = min(u, b[dp[u]]);
		int lo = 0;
		int hi = n;
		while(lo < hi){
			int mid = lo + (hi - lo + 1)/2;
			if(b[mid] < i - l[i]){
				lo = mid;
			}
			else hi = mid - 1;
		}
		dp[i] = lo + 1;
		todo[i + r[i] + 1].pb(i);
	}
	//f0r(i, n)cout<<dp[i]<<' ';
	//cout<<'\n';
	int ans = 0;
	f0r(i, n)ans = max(ans, dp[i]);
	cout<<ans;
}

• Subtask 1: 8 / 8
• Subtask 2: 16 / 16
• Subtask 3: 28 / 28
• Subtask 4: 18 / 18
• Subtask 5: 30 / 30