Submission #932658

#	Time	Username	Problem	Language	Result	Execution time	Memory
932658		Whisper	Kamenčići (COCI21_kamencici)	C++17	70 / 70	94 ms	339164 KiB

Main

#include <bits/stdc++.h>

using namespace std;
using ll = long long;

#define int long long
#define FOR(i, a, b) for ( int i = a ; i <= b ; i++ )
#define FORD(i, a, b) for (int i = b; i >= a; i --)
#define REP(i, n) for (int i = 0; i < n; ++i)
#define REPD(i, n) for (int i = n - 1; i >= 0; --i)
#define pii pair<int , int>
#define Lg(x) 31 - __builtin_clz(x)

#define MASK(i) (1LL << (i))
#define BIT(x, i) (((x) >> (i)) & 1)

constexpr ll LINF = (1ll << 60);
constexpr int INF = (1ll << 30);
constexpr int MAX = 351;
constexpr int Mod = 1e9 + 7;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

void setupIO(){
    #define name "Whisper"
    //Phu Trong from Nguyen Tat Thanh High School for gifted student
    srand(time(NULL));
    cin.tie(nullptr)->sync_with_stdio(false); cout.tie(nullptr);
    //freopen(name".inp", "r", stdin);
    //freopen(name".out", "w", stdout);
    cout << fixed << setprecision(10);
}

template <class X, class Y>
    bool minimize(X &x, const Y &y){
        X eps = 1e-9;
        if (x > y + eps) {x = y; return 1;}
        return 0;
    }

template <class X, class Y>
    bool maximize(X &x, const Y &y){
        X eps = 1e-9;
        if (x + eps < y) {x = y; return 1;}
        return 0;
    }
int nArr, numNeed;
string s;
int dp[MAX][MAX][MAX];
int G[MAX];
int F(int l, int r, int cur){
    if (l > r) return 1;
    if (cur == numNeed) return 1;
    int &res = dp[l][r][cur];
    if (~res) return res;

    int prv = G[l - 1] + (G[nArr] - G[r]) - cur;
    res = 0;
    res |= !F(l + 1, r, prv + (s[l] == 'C'));
    res |= !F(l, r - 1, prv + (s[r] == 'C'));
    return res;
}
void Whisper(){
    cin >> nArr >> numNeed >> s;
    s = '@' + s;
    for (int i = 1; i <= nArr; ++i) G[i] = G[i - 1] + (s[i] == 'C');
    memset(dp, -1, sizeof dp);
    cout << (F(1, nArr, 0) ? "DA" : "NE");
}


signed main(){
    setupIO();
    int Test = 1;
//    cin >> Test;
    for ( int i = 1 ; i <= Test ; i++ ){
        Whisper();
        if (i < Test) cout << '\n';
    }
}

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