Submission #1191201

#	Time	Username	Problem	Language	Result	Execution time	Memory
1191201		Gray	L-triominoes (CEOI21_ltriominoes)	C++20	0 / 100	692 ms	589824 KiB

ltrominoes

#include <bits/stdc++.h>
#include <ratio>
using namespace std;
#define ll long long
#define ull unsigned long long
#define ld long double
#define ff first
#define ss second
#define ln "\n"
#define mp make_pair
#define pb push_back
#define INF (ll)1e18
ll MOD = (ll)(1e9+7);

void compute(ll i, ll w, ll cur, ll next, vector<ll> &wr){
    if (i==w){
        wr[next]=1;
    }else{
        if (i+1<w and !(cur&(1ull<<i)) and !(cur&(1ull<<(i+1))) and !(next&(1ull<<i))){
            compute(i+2, w, ((cur|(1ull<<i))|(1ull<<(i+1))), next|(1ull<<i), wr);
        }
        if (i+1<w and !(cur&(1ull<<i)) and !(cur&(1ull<<(i+1))) and !(next&(1ull<<(i+1)))){
            compute(i+2, w, ((cur|(1ull<<i))|(1ull<<(i+1))), next|(1ull<<(i+1)), wr);
        }
        if (i and !(cur&(1ull<<i)) and !(next&(1ull<<(i-1)) and !(next&(1ull<<i)))){
            compute(i+1, w, ((cur|(1ull<<i))), (next|(1ull<<(i-1)|(1ull<<i))), wr);
        }
        if (i+1<w and !(cur&(1ull<<i)) and !(next&(1ull<<i)) and !(next&(1ull<<(i+1)))){
            compute(i+1, w, ((cur|(1ull<<i))), (next|(1ull<<(i+1)|(1ull<<i))), wr);
        }
        if (cur&(1ull<<i)) compute(i+1, w, cur, next, wr);
    }
}

void solve(){
    ll w, h, k; cin >> w >> h >> k;
    vector<vector<ll>> dp(h, vector<ll>(1<<w));
    vector<ll> gr(h);
    for (ll i=0; i<k; i++){
        ll x, y; cin >> x >> y;
        gr[y-1]|=(1<<(x-1));
    }
    compute(0, w, gr[0], gr[1], dp[1]);
    for (ll i=1; i<h-1; i++){
        for (ll j=0; j<(1<<w); j++){
            if (dp[i][j]){
                compute(0, w, j, gr[i+1], dp[i+1]);
            }
        }
    }
    if (dp.back()[(1<<w)-1]) cout << "YES\n";
    else cout << "NO\n";
}

int main(){
    ios_base::sync_with_stdio(false); cin.tie(nullptr);
    #ifdef LOCAL
    auto start = chrono::high_resolution_clock::now();
    #endif
    ll testc=1;
    // cin >> testc;
    for (ll __c=1; __c<=testc; __c++) solve();
    #ifdef LOCAL
    auto duration = chrono::duration_cast<chrono::microseconds>(chrono::high_resolution_clock::now() - start);
    cout << setprecision(0) << fixed << "time: " << (double)duration.count()/1000.0 << " milliseconds" << endl;
    #endif
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 7
• Subtask 3: 0 / 11
• Subtask 4: 0 / 17
• Subtask 5: 0 / 35
• Subtask 6: 0 / 20