Submission #311098

#	Time	Username	Problem	Language	Result	Execution time	Memory
311098		Vladth11	Political Development (BOI17_politicaldevelopment)	C++14	0 / 100	54 ms	2944 KiB

politicaldevelopment

//Chiar si dupa editorial la sf am avut nevoie de ajutor cum fac cu inceputul si sf. Multumiri sursei lui Dani
#include <bits/stdc++.h>
#define debug(x) cerr << #x << " " << x << "\n"
#define debug_with_space(x) cerr << #x << " " << x << " "

using namespace std;
typedef long long ll;
typedef pair <ll, ll> pii;
typedef pair <ll, pii> muchie;

const ll NMAX = 100005;
const ll INF = (1LL << 60);
const ll MOD = 1000000007;
const ll BLOCK = 101;

vector <int> v[NMAX];
unordered_set <int> st;

int main() {
    // ifstream cin("catsfood.in");
    // ofstream cout("catsfood.out");
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n, k, i, d;
    cin >> n >> k;
    for(i = 1; i <= n; i++){
        int d;
        cin >> d;
        v[i].push_back(i);
        while(d--){
            int x;
            cin >> x;
            v[i].push_back(x);
        }
        sort(v[i].begin(), v[i].end());
    }
    int maxim = 0;
    for(i = 1; i <= n; i++){
        int nrbits = v[i].size();
        for(int mask = 1; mask < (1 << nrbits); mask++){
            st.clear();
            int cnt = 0;
            for(int j = nrbits - 1;j >= 0;j--){
                if(mask & (1 << j)){
                    st.insert(j);
                    for(auto x : v[v[i][j]]){
                        if(st.find(x) != st.end())
                            cnt++;
                    }
                }
            }
            int bb = __builtin_popcount(mask) + 1;
            if(cnt == bb * (bb - 1) / 2)
                maxim = max(maxim, bb);
        }
    }
    cout << maxim;
    return 0;
}

Compilation message (stderr)

politicaldevelopment.cpp: In function 'int main()':
politicaldevelopment.cpp:25:18: warning: unused variable 'd' [-Wunused-variable]
   25 |     int n, k, i, d;
      |                  ^

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