Submission #516893

#	Time	Username	Problem	Language	Result	Execution time	Memory
516893		Marslai24	Kamenčići (COCI21_kamencici)	C++17	30 / 70	1089 ms	312 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#define int long long // a.k.a. TLE creator
#define all(x) x.begin(), x.end()
template<class A, class B> istream& operator >>(istream &o, pair<A, B> &x){return o >> x.first >> x.second;}
template<class A, class B> ostream& operator <<(ostream &o, pair<A, B> &x){return o << x.first << ' ' << x.second << ' ';}
void setIO(){ios::sync_with_stdio(false); cin.tie(0);}
const int INF = INT_MAX, MOD = 998244353, N = 1e6 + 2, K = __lg(N) + 1;

int n, k;
string s;

bool solve(int l = 0, int r = n - 1, int me = 0, int op = 0){
    if(me >= k)return false;
    if(op >= k)return true;
    if(l > r)return me < k;
    if(l == r)return me + s[l] < k;
    if(solve(l + 2, r, me + s[l], op + s[l + 1]) && solve(l + 1, r - 1, me + s[l], op + s[r]))return true;
    if(solve(l, r - 2, me + s[r], op + s[r - 1]) && solve(l + 1, r - 1, me + s[r], op + s[l]))return true;
    return false;
}

signed main(){
    setIO();
    cin >> n >> k >> s;
    for(auto &i : s)i = (i == 'C');
    cout << (solve() ? "DA\n" : "NE\n");
}

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