Submission #731017

#	Time	Username	Problem	Language	Result	Execution time	Memory
731017		murad_2005	Kamenčići (COCI21_kamencici)	C++14	30 / 70	1081 ms	175412 KiB

Main

#include<bits/stdc++.h>
#define ll long long
#define ld long double
#define pii pair<int, int>
#define piii pair<int, pii>
#define pllll pair<ll, ll>
#define plli pair<ll, int>
#define vi vector<int>
#define vvi vector<vector<int>>
#define pb push_back
#define pf push_front
#define eb emplace_back
#define all(v) v.begin(), v.end()
#define size(v) v.size()
#define INF 2e9
#define f first
#define s second
#define ln "\n"

using namespace std;

const int up = 355;

string s;

int n, k;
int dp[up][up][up], preff[up];

void init(){
    for(int i = 0; i < up; ++i){
        for(int j = 0; j < up; ++j){
            for(int k = 0; k < up; ++k){
                dp[i][j][k] = -1;
            }
        }
    }
}

int win(int l, int r, int red){
    int ok = dp[l][r][k];
    if(ok == -1){
        int total_red = preff[n - 1];
        int red_left = preff[r];
        if(l) red_left -= preff[l - 1];
        int other_red = total_red - red_left - red;
        if(red >= k){
            ok = 0;
        }else if(other_red >= k){
            ok = 1;
        }else{
            if(!win(l + 1, r, other_red) || !win(l, r - 1, other_red)){
                ok = 1;
            }else{
                ok = 0;
            }
        }
    }
    return ok;
}

void solve(){
    cin >> n >> k;
    cin >> s;
    init();
    preff[0] = (s[0] == 'C');
    for(int i = 1; i < n; ++i){
        preff[i] = preff[i - 1] + (s[i] == 'C');
    }
    cout << (win(0, n - 1, 0) ? "DA" : "NE");
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int t;
    t = 1;
    // cin >> t;
    while(t--){
        solve();
    }
    return 0;
}

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