Submission #1259413

#	Time	Username	Problem	Language	Result	Execution time	Memory
1259413		lmaobruh	Kamenčići (COCI21_kamencici)	C++20	70 / 70	96 ms	175444 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define eb emplace_back
#define pb push_back
#define fi first
#define se second
#define ii pair<int,int>
#define ve vector
#define vi ve<int>
#define vvi ve<vi>
#define all(x) x.begin(), x.end()
#define fo(i,a,b) for (int i=(a),_b=(b); i<=_b; ++i)
#define fd(i,a,b) for (int i=(a),_b=(b); i>=_b; --i)
#define maxi(a, b) a = max(a, b)
#define mini(a, b) a = min(a, b)

const int N = 355, inf = 1e9+10, mod = 1e9+7;

int n, k, dp[N][N][N];
string s;

int f(int l, int r, int cnt0, int cnt1, int turn) {
    assert(l<=r);
    if (dp[l][r][cnt0] != -1) return dp[l][r][cnt0];
    int &ans=dp[l][r][cnt0];
    int cl = (s[l] == 'C'), cr = (s[r] == 'C');
    if (turn) {
        ans=0;
        if (cnt0 + cl < k) ans|=f(l+1,r,cnt0+cl,cnt1,turn^1);
        if (cnt0 + cr < k) ans|=f(l,r-1,cnt0+cr,cnt1,turn^1);
    } else {
        ans=1;
        if (cnt1 + cl < k) ans&=f(l+1,r,cnt0,cnt1+cl,turn^1);
        if (cnt1 + cr < k) ans&=f(l,r-1,cnt0,cnt1+cr,turn^1);
    }
    return ans;
}

void sol() {
    cin >> n >> k >> s;
    memset(dp,-1,sizeof(dp));
    s = ' ' + s;
    cout << (f(1,n,0,0,1)?"DA":"NE");
}

signed main(){
    ios::sync_with_stdio(0); cin.tie(0);
    if(fopen("A.inp","r")) {
        freopen("A.inp","r",stdin);
        freopen("A.out","w",stdout);
    }
    int tc = 1; // cin >> tc;
    fo(i,1,tc) sol();
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:50:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |         freopen("A.inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~
Main.cpp:51:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |         freopen("A.out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~

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