# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
862118 | Youssif_Elkadi | Kamenčići (COCI21_kamencici) | C++17 | 0 ms | 0 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
const long long N = 351, mod = 1e9 + 7, base = 31;
int dp[N][N][N][2];
int n, k;
int pref[N];
string x;
int solve(int l, int r, int rem1, int t)
{
int rem2;
if (rem1 == 0)
return 0;
if (rem2 == 0)
return 1;
if (~dp[l][r][rem1][t])
return dp[l][r][rem1][t];
if (t)
return dp[l][r][rem1][rem2][t] = min(solve(l + 1, r, rem1, rem2 - (x[l] == 'C'), 0), solve(l, r - 1, rem1, rem2 - (x[r] == 'C'), 0));
else
return dp[l][r][rem1][rem2][t] = max(solve(l + 1, r, rem1 - (x[l] == 'C'), rem2, 1), solve(l, r - 1, rem1 - (x[r] == 'C'), rem2, 1));
}
int main()
{
memset(dp, -1, sizeof dp);
cin >> n >> k;
cin >> x;
for (int i = 0; i < n; i++)
{
pref[i] = (x[i] == 'C');
if (i)
pref[i] += pref[i - 1];
}
cout << (solve(0, n - 1, k, 0) ? "DA" : "NE");
}