Submission #573649

#	Time	Username	Problem	Language	Result	Execution time	Memory
573649		Soul234	Kamenčići (COCI21_kamencici)	C++14	70 / 70	168 ms	350668 KiB

Main

#include<bits/stdc++.h>
using namespace std;

void DBG() { cerr << "]\n"; }
template<class H, class... T> void DBG(H h, T... t) {
    cerr << h; if(sizeof...(t)) cerr << ", ";
    DBG(t...);
}
#ifdef LOCAL
#define dbg(...) cerr << "[" << #__VA_ARGS__ << "]: [", DBG(__VA_ARGS__)
#else
#define dbg(...) 0
#endif // LOCAL

#define FOR(i,a,b) for(int i = (a) ; i<(b) ; i++)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for(int i = (b)-1 ; i>=(a) ; i--)
#define R0F(i,a) ROF(i,0,a)
#define each(e,a) for(auto &e : (a))
#define sz(v) (int)(v).size()
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define pb push_back
#define tcT template<class T
#define nl "\n"

using ll = long long;
using vi = vector<int>;
using pi = pair<int,int>;
using str = string;
tcT> using V = vector<T>;
tcT> using pqg = priority_queue<T,vector<T>,greater<T>>;

void setIO(string NAME = "") {
    cin.tie(0)->sync_with_stdio(0);
    if(sz(NAME)) {
        freopen((NAME + ".inp").c_str(),"r",stdin);
        freopen((NAME + ".out").c_str(),"w",stdout);
    }
}

tcT> bool ckmin(T&a, const T&b) {
    return b < a ? a=b,1 : 0; }
tcT> bool ckmax(T&a, const T&b) {
    return b > a ? a=b,1 : 0; }

const int MOD = 1e9 + 7;

const int MX = 355;
int psum[MX], N, K;
int dp[MX][MX][MX][2];
str s;

int calc(int l, int r, int redtaken, int turn) {
    if(redtaken == K) return 0;
    if(psum[N] - (psum[r] - psum[l-1]) - redtaken == K) return 1;
    int &res = dp[l][r][redtaken][turn];
    if(~res) return res;
    res = turn;
    if(!turn) {
        res |= calc(l+1, r, redtaken + (s[l-1] == 'C'), turn^1);
        res |= calc(l, r-1, redtaken + (s[r-1] == 'C'), turn^1);
    }
    else {
        res &= calc(l+1, r, redtaken, turn^1);
        res &= calc(l, r-1, redtaken, turn^1);
    }
    return res;
}

void solve() {
    memset(dp, -1, sizeof dp);
    cin>>N>>K;
    cin>>s;
    F0R(i,N) psum[i+1] = psum[i] + (s[i] == 'C');
    cout << (calc(1, N, 0, 0) ? "DA" : "NE") << nl;
}

int main() {
    setIO();

    int t=1;
    //cin>>t;
    while(t-->0) {
        solve();
    }

    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'void setIO(std::string)':
Main.cpp:37:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |         freopen((NAME + ".inp").c_str(),"r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:38:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |         freopen((NAME + ".out").c_str(),"w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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