oj.uz

Submission #412876

# Submission time Handle Problem Language Result Execution time Memory
412876 2021-05-27T18:05:58 Z amoo_safar Sparklers (JOI17_sparklers) C++17
50 / 100
 147 ms 16204 KB 
// vaziat meshki-ghermeze !
#include <bits/stdc++.h>

#define pb push_back
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define debug(x) cerr << #x << " : " << x << '\n'

using namespace std;

typedef long long ll;
typedef long double ld;
typedef string str;
typedef pair<ll, ll> pll;

const ll Mod = 1000000007LL;
const int N = 2e3 + 10;
const ll Inf = 2242545357980376863LL;
const ll Log = 30;

int n, k;
ll X[N];
vector<ll> A, B;
ll psA[N], psB[N];

int dp[N][N];

bool Check(ll T){
	if(T > 1000000000)
		return true;
	A = {T};
	B = {};
	for(int i = k + 1; i <= n; i++){
		A.pb(X[i - 1] - X[i]);
		A.pb(T);
	}
	for(int i = k - 1; i >= 1; i--){
		B.pb(X[i] - X[i + 1]);
		B.pb(T);
	}
	psA[0] = 0;
	for(int i = 1; i <= (int) A.size(); i++)
		psA[i] = psA[i - 1] + A[i - 1];
	psB[0] = 0;
	for(int i = 1; i <= (int) B.size(); i++)
		psB[i] = psB[i - 1] + B[i - 1];

	memset(dp, 0, sizeof dp);
	int sa = A.size(), sb = B.size();
	dp[0][0] = 1;
	for(int i = 0; i <= sa; i++){
		for(int j = 0; j <= sb; j++){
			if(i + j == 0) continue;
			if(psA[i] + psB[j] < 0) continue;
			if(i)
				dp[i][j] |= dp[i - 1][j];
			if(j)
				dp[i][j] |= dp[i][j - 1];
		}
	}
	return dp[sa][sb];
}

int main(){
	ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	ll T;
	cin >> n >> k >> T;
	for(int i = 1; i <= n; i++)
		cin >> X[i];

	int mid, L = -1, R = 1000000000;
	while(L + 1 < R){
		mid = (L + R) >> 1;
		if(Check(2ll * T * mid))
			R = mid;
		else L = mid;
	}
	cout << R << '\n';
	return 0;
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 62 ms 16132 KB Output is correct
2 Correct 63 ms 16116 KB Output is correct
3 Correct 59 ms 16076 KB Output is correct
4 Correct 62 ms 16120 KB Output is correct
5 Correct 65 ms 16116 KB Output is correct
6 Correct 69 ms 16076 KB Output is correct
7 Correct 64 ms 16076 KB Output is correct
8 Correct 62 ms 16076 KB Output is correct
9 Correct 64 ms 16116 KB Output is correct
10 Correct 63 ms 16076 KB Output is correct
11 Correct 67 ms 16076 KB Output is correct
12 Correct 67 ms 16076 KB Output is correct
13 Correct 66 ms 16076 KB Output is correct
14 Correct 65 ms 16116 KB Output is correct
15 Correct 65 ms 16116 KB Output is correct
16 Correct 65 ms 16076 KB Output is correct
17 Correct 68 ms 16040 KB Output is correct
18 Correct 65 ms 16116 KB Output is correct
19 Correct 63 ms 16116 KB Output is correct
20 Correct 10 ms 16076 KB Output is correct
21 Correct 62 ms 16116 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 62 ms 16132 KB Output is correct
2 Correct 63 ms 16116 KB Output is correct
3 Correct 59 ms 16076 KB Output is correct
4 Correct 62 ms 16120 KB Output is correct
5 Correct 65 ms 16116 KB Output is correct
6 Correct 69 ms 16076 KB Output is correct
7 Correct 64 ms 16076 KB Output is correct
8 Correct 62 ms 16076 KB Output is correct
9 Correct 64 ms 16116 KB Output is correct
10 Correct 63 ms 16076 KB Output is correct
11 Correct 67 ms 16076 KB Output is correct
12 Correct 67 ms 16076 KB Output is correct
13 Correct 66 ms 16076 KB Output is correct
14 Correct 65 ms 16116 KB Output is correct
15 Correct 65 ms 16116 KB Output is correct
16 Correct 65 ms 16076 KB Output is correct
17 Correct 68 ms 16040 KB Output is correct
18 Correct 65 ms 16116 KB Output is correct
19 Correct 63 ms 16116 KB Output is correct
20 Correct 10 ms 16076 KB Output is correct
21 Correct 62 ms 16116 KB Output is correct
22 Correct 99 ms 16076 KB Output is correct
23 Correct 71 ms 16152 KB Output is correct
24 Correct 70 ms 16204 KB Output is correct
25 Correct 72 ms 16076 KB Output is correct
26 Correct 99 ms 16076 KB Output is correct
27 Correct 110 ms 16076 KB Output is correct
28 Correct 141 ms 16204 KB Output is correct
29 Correct 131 ms 16204 KB Output is correct
30 Correct 109 ms 16204 KB Output is correct
31 Correct 119 ms 16076 KB Output is correct
32 Correct 134 ms 16076 KB Output is correct
33 Correct 135 ms 16076 KB Output is correct
34 Correct 98 ms 16204 KB Output is correct
35 Correct 121 ms 16204 KB Output is correct
36 Correct 97 ms 16204 KB Output is correct
37 Correct 89 ms 16196 KB Output is correct
38 Correct 128 ms 16204 KB Output is correct
39 Correct 79 ms 16180 KB Output is correct
40 Correct 147 ms 16204 KB Output is correct

Subtask #3
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 62 ms 16132 KB Output is correct
2 Correct 63 ms 16116 KB Output is correct
3 Correct 59 ms 16076 KB Output is correct
4 Correct 62 ms 16120 KB Output is correct
5 Correct 65 ms 16116 KB Output is correct
6 Correct 69 ms 16076 KB Output is correct
7 Correct 64 ms 16076 KB Output is correct
8 Correct 62 ms 16076 KB Output is correct
9 Correct 64 ms 16116 KB Output is correct
10 Correct 63 ms 16076 KB Output is correct
11 Correct 67 ms 16076 KB Output is correct
12 Correct 67 ms 16076 KB Output is correct
13 Correct 66 ms 16076 KB Output is correct
14 Correct 65 ms 16116 KB Output is correct
15 Correct 65 ms 16116 KB Output is correct
16 Correct 65 ms 16076 KB Output is correct
17 Correct 68 ms 16040 KB Output is correct
18 Correct 65 ms 16116 KB Output is correct
19 Correct 63 ms 16116 KB Output is correct
20 Correct 10 ms 16076 KB Output is correct
21 Correct 62 ms 16116 KB Output is correct
22 Correct 99 ms 16076 KB Output is correct
23 Correct 71 ms 16152 KB Output is correct
24 Correct 70 ms 16204 KB Output is correct
25 Correct 72 ms 16076 KB Output is correct
26 Correct 99 ms 16076 KB Output is correct
27 Correct 110 ms 16076 KB Output is correct
28 Correct 141 ms 16204 KB Output is correct
29 Correct 131 ms 16204 KB Output is correct
30 Correct 109 ms 16204 KB Output is correct
31 Correct 119 ms 16076 KB Output is correct
32 Correct 134 ms 16076 KB Output is correct
33 Correct 135 ms 16076 KB Output is correct
34 Correct 98 ms 16204 KB Output is correct
35 Correct 121 ms 16204 KB Output is correct
36 Correct 97 ms 16204 KB Output is correct
37 Correct 89 ms 16196 KB Output is correct
38 Correct 128 ms 16204 KB Output is correct
39 Correct 79 ms 16180 KB Output is correct
40 Correct 147 ms 16204 KB Output is correct
41 Runtime error 2 ms 576 KB Execution killed with signal 11
42 Halted 0 ms 0 KB -