Submission #527908

#	Time	Username	Problem	Language	Result	Execution time	Memory
527908		Jarif_Rahman	Kamenčići (COCI21_kamencici)	C++17	70 / 70	286 ms	172332 KiB

Main

#include <bits/stdc++.h>
#define pb push_back
#define f first
#define sc second
using namespace std;
typedef long long int ll;
typedef string str;
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int n, k; cin >> n >> k;
    string s; cin >> s;

    vector<vector<vector<int>>> dp(n, vector<vector<int>>(n, vector<int>(n, 0)));

    for(int i = 0; i < n; i++){
        if((n-1)%2 == 0 && s[i] == 'C') dp[i][i][0] = 1;
    }

    for(int sz = 2; sz <= n; sz++) for(int i = 0; i+sz-1 < n; i++){
        int j = i+sz-1;

        for(int kk = 0; kk < n; kk++){
            if(kk != 0) dp[i][j][kk] = dp[i][j][kk-1];

            if((n-sz)%2 == 1){
                dp[i][j][kk] = min(dp[i+1][j][kk]+ (s[i]=='C'), dp[i][j-1][kk]+(s[j]=='C'));
            }
            if((n-sz)%2 == 0){
                if(kk == 0){
                    if(s[i] != 'C') dp[i][j][kk] = max(dp[i][j][kk], dp[i+1][j][kk]);
                    if(s[j] != 'C') dp[i][j][kk] = max(dp[i][j][kk], dp[i][j-1][kk]);
                    continue;
                }
                dp[i][j][kk] = max(dp[i+1][j][kk-(s[i]=='C')], dp[i][j-1][kk-(s[j]=='C')]);
            }
        }
    }

    if(dp[0][n-1][k-1] >= k) cout << "DA\n";
    else cout << "NE\n";
}

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