Submission #525889

#	Time	Username	Problem	Language	Result	Execution time	Memory
525889		BackNoob	Kamenčići (COCI21_kamencici)	C++14	70 / 70	45 ms	44528 KiB

Main

#include <bits/stdc++.h>
#define ll long long
#define fi first
#define se second
#define endl '\n'
#define MASK(i) (1LL << (i))
#define ull unsigned long long
#define ld long double
#define pb push_back
#define all(x) (x).begin() , (x).end()
#define BIT(x , i) ((x >> (i)) & 1) 
#define TASK "task"
#define sz(s) (int) (s).size()

using namespace std;
const int mxN = 357;
const int inf = 1e9 + 277;
const int mod = 1e9 + 7;
const ll infll = 1e18 + 7;
const int base = 307;
const int LOG = 20;
 
template <typename T1, typename T2> bool minimize(T1 &a, T2 b) {
	if (a > b) {a = b; return true;} return false;
}
template <typename T1, typename T2> bool maximize(T1 &a, T2 b) {
	if (a < b) {a = b; return true;} return false;
}

int n , k;
string s;
bool dp[mxN][mxN][mxN];
bool vis[mxN][mxN][mxN];
int pre[mxN];
int suf[mxN];

bool sol(int l , int r , int have)
{
	if(l > r) {
		if(have >= k) return false;
		return true;
	}
	int x = pre[l - 1] + suf[r + 1] - have;
	if(have >= k) return false;
	if(x >= k) return true;

	bool &res = dp[l][r][have];
	if(vis[l][r][have] == true) return res;
	vis[l][r][have] = true;


	res |= !sol(l + 1 , r , x);
	res |= !sol(l , r - 1 , x);
	return res;
}

void solve()
{
	cin >> n >> k;
	cin >> s;

	for(int i = 1 ; i <= n ; i++) pre[i] = pre[i - 1] + (s[i - 1] == 'C');
	for(int i = n ; i >= 1 ; i--) suf[i] = suf[i + 1] + (s[i - 1] == 'C');

	if(sol(1 , n , 0) == true) cout << "DA";
	else cout << "NE";
}
 
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    //freopen(TASK".in" , "r" , stdin);
    //freopen(TASK".out" , "w" , stdout);
    
    int tc = 1;
    //cin >> tc;
    while(tc--) {
    	solve();
    }
    return 0;
}

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