oj.uz

Submission #651614

# Submission time Handle Problem Language Result Execution time Memory
651614 2022-10-19T12:47:51 Z Koful123 Watching (JOI13_watching) C++17
50 / 100
 170 ms 262144 KB 
#include <bits/stdc++.h>
using namespace std;
#define endl "\n"
#define pb push_back
#define ff first
#define ss second
#define mod 1000000007
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()

int n,p,q;
vector<int> v;
vector<vector<vector<pair<bool,bool>>>> dp;

bool f(int pos,int p,int q,int w){
	if(p < 0 || q < 0) return false;
	if(pos >= n) return true;
	if(dp[pos][p][q].ss) return dp[pos][p][q].ff;
	int a = lower_bound(all(v),v[pos] + w) - v.begin();
	int b = lower_bound(all(v),v[pos] + 2*w) - v.begin();
	dp[pos][p][q].ff = ((a > pos && f(a,p-1,q,w)) || (b > pos && f(b,p,q-1,w))); dp[pos][p][q].ss = true;
	return dp[pos][p][q].ff;
}

bool check(int m){
	for(int i=0;i<n;i++){
		for(int j=0;j<=p;j++){
			for(int k=0;k<=q;k++){
				dp[i][j][k].ff = dp[i][j][k].ss = false;
			}
		}
	}
	return f(0,p,q,m);
}

void solve(){

	cin >> n >> p >> q;
	v.assign(n,0);
	for(int i=0;i<n;i++){
		cin >> v[i];
	}

	if(p + q >= n){
		cout << 1 << endl;
		return;
	}

	dp.assign(n,vector<vector<pair<bool,bool>>>(p+1,vector<pair<bool,bool>>(q+1,{false,false})));

	sort(all(v));
	int l = 1,r = 1e9;
	while(l < r){
		int m = (l + r) / 2;
		if(check(m)) r = m;
		else l = m + 1;
	}

	cout << l << endl;
}	

signed main(){

	ios::sync_with_stdio(0);
	cin.tie(0);

	int t = 1;
//	cin >> t;

	while(t--)
		solve();

	return 0;
}

Subtask #1
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 5 ms 472 KB Output is correct
11 Correct 6 ms 724 KB Output is correct
12 Correct 9 ms 980 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct

Subtask #2
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 596 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 15 ms 2504 KB Output is correct
8 Runtime error 170 ms 262144 KB Execution killed with signal 9
9 Halted 0 ms 0 KB -