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Submission #56994

# Submission time Handle Problem Language Result Execution time Memory
56994 2018-07-13T12:35:16 Z Mahmoud_Adel Watching (JOI13_watching) C++14
50 / 100
 1000 ms 26928 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))];
 
	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 3 ms 248 KB Output is correct
2 Correct 2 ms 356 KB Output is correct
3 Correct 2 ms 560 KB Output is correct
4 Correct 3 ms 580 KB Output is correct
5 Correct 3 ms 580 KB Output is correct
6 Correct 3 ms 580 KB Output is correct
7 Correct 3 ms 580 KB Output is correct
8 Correct 5 ms 616 KB Output is correct
9 Correct 4 ms 744 KB Output is correct
10 Correct 45 ms 1016 KB Output is correct
11 Correct 46 ms 1232 KB Output is correct
12 Correct 76 ms 1664 KB Output is correct
13 Correct 3 ms 1664 KB Output is correct
14 Correct 3 ms 1664 KB Output is correct
15 Correct 2 ms 1664 KB Output is correct

Subtask #2
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1664 KB Output is correct
2 Correct 2 ms 1664 KB Output is correct
3 Correct 2 ms 1664 KB Output is correct
4 Correct 2 ms 1664 KB Output is correct
5 Correct 2 ms 1664 KB Output is correct
6 Correct 4 ms 1664 KB Output is correct
7 Correct 19 ms 1664 KB Output is correct
8 Execution timed out 1088 ms 26928 KB Time limit exceeded
9 Halted 0 ms 0 KB -