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Submission #641582

# Submission time Handle Problem Language Result Execution time Memory
641582 2022-09-17T05:43:10 Z Chal1shkan Kamenčići (COCI21_kamencici) C++14
0 / 70
 0 ms 340 KB 
# include <bits/stdc++.h>

# define mkp make_pair
# define ff first
# define ss second
# define pll pair <ll, ll>
# define pii pair <int, int>
 
# define vec vector
# define pb push_back
# define pf push_front
# define ppb pop_back
# define ppf pop_front

# define all(x) (x).begin(), (x).end()
# define rall(x) (x).rbegin(), (x).rend()
# define sz(x) ((int)(x).size())
# define lb lower_bound
# define ub upper_bound

# define br break
# define rt return 
# define cn continue
# define nl "\n"
# define off exit(0)

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;

const ll MAXN = 1e5 + 25;
const ll MAXL = 18 + 0;
const ll INF1 = 1e18 + 0;
const ll INF2 = 2e9 + 0;
const ll MOD = 1e9 + 7;
const ll M0D = 998244353;
const ld PI = acos((ld) -1);
const ll P = 67 + 0 + 0;
int dx[4] = {-1, 0, 1, 0};
int dy[4] = {0, -1, 0, 1};

using namespace std;

void qataima ()
{
    ios::sync_with_stdio(false);
    
    cin.tie(0);

}

int n, k, pref[MAXN];
	string s;
bool dp[405][405][405];
bool used[405][405][405];

bool search (int l, int r, int cnt, bool boo)
{
	if (l + r >= n) rt 0;
	if (used[l][r][cnt]) rt dp[l][r][cnt];
	used[l][r][cnt] = 1;
	int sum = pref[l] + (pref[n - 1] - pref[r]);
	if ((sum - cnt) == k) rt dp[l][r][cnt] = 1;
	if (cnt == k) rt dp[l][r][cnt] = 0;
	if (boo)
	{
		boo = 1 - boo;
		dp[l][r][cnt] = ( (search(l + 1, r, cnt + (s[l] == 'C' ? 1 : 0), boo)) | (search(l, r - 1, cnt + (s[r] == 'C' ? 1 : 0), boo)) );
	}
	else
	{
		boo = 1 - boo;
		dp[l][r][cnt] = ( (search(l + 1, r, cnt, boo)) | (search(l, r - 1, cnt, boo))  );
	}
	rt dp[l][r][cnt];
}

void ma1n ()
{
	cin >> n >> k;
	cin >> s;
	for (int i = 0; i < n; ++i)
	{
		if (i == 0)
		{
			pref[i] = (s[i] == 'C');
			cn;
		}
		pref[i] = pref[i - 1] + (s[i] == 'C');
	}
	int l = 0, r = n - 1, cnt = 0;
	bool boo = 1;
	cout << (search(l, r, cnt, boo) ? "DA" : "NE") << nl;
}
	
int main (/* <3 */)
{	
	qataima ();
	int zxc = 1;
//	cin >> zxc;
	while (zxc--)
	{
		ma1n();
	}
    return 0;
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -