Submission #539191

#	Time	Username	Problem	Language	Result	Execution time	Memory
539191		Soul234	Beautiful row (IZhO12_beauty)	C++14	100 / 100	985 ms	164512 KiB

beauty

#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);
    }
}

constexpr bool onbit(int x, int i) { return x>>i&1;}

const int MX = 25;
int cnt[2][MX], N;
ll dp[1<<20][20];

bool ok(int i, int j) {
    F0R(ind,2) if(cnt[ind][i] == cnt[ind][j]) return true;
    return false;
}

void solve() {
    cin>>N;
    F0R(i,N) {
        int val;
        cin>>val;
        cnt[0][i] = __builtin_popcount(val);
        while(val > 0) {
            cnt[1][i] += (val%3 == 1);
            val /= 3;
        }
    }
    F0R(i,N) dp[1<<i][i] = 1;
    F0R(msk, 1<<N) {
        F0R(i,N) if(onbit(msk, i) && dp[msk][i] > 0) {
            F0R(j,N) if(!onbit(msk, j) && ok(i,j)) {
                dp[msk|(1<<j)][j] += dp[msk][i];
            }
        }
    }
    ll ans = 0;
    F0R(i,N) ans += dp[(1<<N)-1][i];
    cout << ans << nl;
}

int main() {
    setIO();

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

    return 0;
}

Compilation message (stderr)

beauty.cpp: In function 'void setIO(std::string)':
beauty.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);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
beauty.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: 100 / 100