oj.uz

Submission #56995

# Submission time Handle Problem Language Result Execution time Memory
56995 2018-07-13T12:39:12 Z Mahmoud_Adel Watching (JOI13_watching) C++14
50 / 100
 1000 ms 24820 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/detail/standard_policies.hpp>
#include <ext/pb_ds/assoc_container.hpp> // Common file
#include <ext/pb_ds/tree_policy.hpp> // Including tree_order_statistics_node_update


#define f first
#define s second
#define pb push_back
#define mp make_pair
#define clr(dp,i) memset(dp,i,sizeof(dp))
#define opt     ios_base::sync_with_stdio(NULL);cin.tie(NULL);cout.tie(NULL);

using namespace std;
using namespace __gnu_pbds;
//typedef tree<int, null_type, less<int>, rb_tree_tag,
//tree_order_statistics_node_update> oset;
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
typedef pair<int, int> pii;
const long long mod = 1e9+7;
const ld pi = 3.14159265358979323846264338327950288;
//==================================================
int n, p, q, w, ans, a[2001];
map<pair<int, pii>, bool> dp;
bool check(int i=0, int remp=p, int remq=q, int mx = -1)
{
	if(i == n)
	return 1;
	if(mx > a[i])
	return check(i+1, remp, remq, mx);
	if(dp.count(mp(i, pii(remp, remq))))
	return dp[mp(i, pii(remp, remq))];
	bool &ret = dp[mp(i, pii(remp, remq))];
	if(n-i <= remp + remq)
	return ret = 1;
	ret = 0;
	if(remp)
	ret = check(i+1, remp-1, remq, a[i]+w);
	if(remq)
	ret = ret | check(i+1, remp, remq-1, a[i] + 2 * w);

	return ret;
}
int main()
{
	opt;
	cin >> n >> p >> q;
	for(int i=0; i<n; i++)
	cin >> a[i];
	sort(a, a+n);
	if(p+q >= n)
	{
		cout << 1 << endl;
		return 0;
	}
	int s = 1, e = 1e9;
	while(s <= e)
	{
		dp.clear();
		int mid = (s+e)/2;
		w = mid;
		if(check())
		ans = mid, e = mid-1;
		else
		s = mid+1;
	}
	cout << ans << endl;
}

Subtask #1
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 248 KB Output is correct
2 Correct 3 ms 356 KB Output is correct
3 Correct 2 ms 520 KB Output is correct
4 Correct 3 ms 520 KB Output is correct
5 Correct 2 ms 520 KB Output is correct
6 Correct 2 ms 524 KB Output is correct
7 Correct 3 ms 524 KB Output is correct
8 Correct 7 ms 544 KB Output is correct
9 Correct 6 ms 544 KB Output is correct
10 Correct 35 ms 1020 KB Output is correct
11 Correct 37 ms 1020 KB Output is correct
12 Correct 11 ms 1020 KB Output is correct
13 Correct 2 ms 1020 KB Output is correct
14 Correct 3 ms 1020 KB Output is correct
15 Correct 3 ms 1020 KB Output is correct

Subtask #2
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 1020 KB Output is correct
2 Correct 3 ms 1020 KB Output is correct
3 Correct 3 ms 1020 KB Output is correct
4 Correct 4 ms 1020 KB Output is correct
5 Correct 4 ms 1020 KB Output is correct
6 Correct 3 ms 1020 KB Output is correct
7 Correct 21 ms 1020 KB Output is correct
8 Execution timed out 1084 ms 24820 KB Time limit exceeded
9 Halted 0 ms 0 KB -