Submission #675506

#	Time	Username	Problem	Language	Result	Execution time	Memory
675506		Tangirkul	Kamenčići (COCI21_kamencici)	C++17	30 / 70	1 ms	1364 KiB

Main

#include<bits/stdc++.h>
  
#define ll long long
#define fi first
#define se second
#define pb push_back
#define sz size
#define Junanna ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
  
using namespace std;
  
const ll K = 32;
const ll INF = 1e9 + 7;
const ll MOD = 1e9 + 7;
const ll N = (1e5 + 125);

ll n, k;
string s;
ll dp[400][400], p[500];

ll rec (ll l, ll r, ll a, ll b)
{
    if (dp[l][r] != -1)
    {
        return dp[l][r];
    }
    if (b == k)
    {
        return 1;
    }
    if (a == k)
    {
        return 0;
    }
    if (l == r)
    {
        if (n % 2 == 0)
        {
            return 1;
        }
        else
        {
            if ((s[l] == 'C' && a < k) || s[l] == 'P')
            {
                return 1;
            }
            else
            {
                return 0;
            }
        }
    }
    if ((n - (r - l + 1)) % 2 == 1)
    {
        dp[l][r] = min (rec (l + 1, r, a, b + (s[l] == 'C')), rec (l, r - 1, a, b + (s[r] == 'C')));
        return dp[l][r];
    }
    else
    {
        dp[l][r] = max (rec (l + 1, r, a + (s[l] == 'C'), b), rec (l, r - 1, a + (s[r] == 'C'), b));
        return dp[l][r];
    }
}

void ma1n ()
{
    cin >> n >> k;
    cin >> s;
    for (ll i = 0; i <= n; i++)
    {
        for (ll j = 0; j <= n; j++)
        {
            dp[i][j] = -1;
        }
    }
    for (ll i = 0; i < n; i++)
    {
        p[i] = p[i - 1] + (s[i] == 'C');
    }
    if (rec (0, n - 1, 0, 0))
    {
        cout << "DA";
    }
    else
    {
        cout << "NE";
    }
}
    
int main ()
{
    Junanna;
    ll t = 1;
    while (t--)
    {
        ma1n ();
    }
    return 0;
} 

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 0 / 40