제출 #1172343

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1172343		DanielPr8	Political Development (BOI17_politicaldevelopment)	C++20	54 / 100	3100 ms	337340 KiB

politicaldevelopment

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vll = vector<ll>;
using vvl = vector<vll>;
using pll = pair<ll,ll>;
using vpl = vector<pll>;
using vvp = vector<vpl>;
using vb = vector<bool>;
using vvb = vector<vb>;
#define f first
#define s second
#define pb push_back
#define all(v) v.begin(),v.end()
vll fr;
bool chek(ll wh, vvb& mat){
    for(ll i = 0; i < fr.size(); ++i){
        if(!(wh & (1<<i)))continue;
        for(ll j = i+1; j < fr.size(); ++j){
            if(!(wh & (1<<j)))continue;
            if(!mat[fr[i]][fr[j]])return 0;
        }
    }
    return 1;
}
ll calc(vvb& mat){
    int ans = 0;
    for(ll i = 0; i < (1<<fr.size()); ++i){
        if(chek(i,mat))ans = max(ans, __builtin_popcount(i));
    }
    return ans;
}
int main(){
    ios_base::sync_with_stdio(0);cin.tie(NULL);
    ll n, k, a, b;
    cin >> n >> k;
    vector<set<ll>> g(n);
    vvb mat(n, vb(n));
    vll dg(n);
    for(ll i = 0; i < n; ++i){
        cin >> a;
        dg[i]=a;
        while(a--){
            cin >> b;
            g[i].insert(b);
            mat[i][b]=1;
        }
    }
    priority_queue<pll, vpl, greater<pll>> pq;
    vb vs(n);
    ll ans = 0;
    for(ll i = 0; i < n; ++i)pq.push({dg[i],i});
    while(!pq.empty()){
        auto [d, cr] = pq.top();pq.pop();
        if(d!=dg[cr])continue;
        if(vs[cr])continue;
        vs[cr]=1;
        fr.clear();
        for(ll i = 0; i < n; ++i){
            if(mat[cr][i]){
                fr.pb(i);
                mat[i][cr]=0;
                mat[cr][i]=0;
                dg[i]--;
                pq.push({dg[i], i});
            }
        }
        ans = max(ans, 1+calc(mat));
    }
    cout << ans;
}

• Subtask 1: 4 / 4
• Subtask 2: 12 / 12
• Subtask 3: 0 / 23
• Subtask 4: 38 / 38
• Subtask 5: 0 / 23