Submission #943821

#	Time	Username	Problem	Language	Result	Execution time	Memory
943821		Pring	Political Development (BOI17_politicaldevelopment)	C++17	100 / 100	377 ms	34752 KiB

politicaldevelopment

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

#ifdef MIKU
const string dbmc = "\033[1;38;2;57;197;187m", dbrs = "\033[0m";
#define debug(x...) cout << dbmc << "[" << #x << "]: ", dout(x)
void dout() { cout << dbrs << endl; }
template <typename T, typename ...U>
void dout(T t, U ...u) { cout << t << (sizeof...(u) ? ", " : ""); dout(u...); }
#else
#define debug(...) 39
#endif

#define int long long
#define fs first
#define sc second
#define mp make_pair
#define FOR(i, j, k) for (int i = j, Z = k; i < Z; i++)
typedef pair<int, int> pii;

const int MXN = 50005;
int n, k, ans = 1;
vector<int> edge[MXN];

int in[MXN];
bitset<MXN> ban;
set<pii> S;
unordered_set<int> EA;
bitset<1 << 10> dp;

int POPCNT(int I) {
    return bitset<16>(I).count();
}

int calc(int id) {
    debug(id);
    ban[id] = true;
    vector<int> v;
    for (auto &i : edge[id]) {
        if (ban[i]) continue;
        S.erase(S.find(mp(in[i], i)));
        S.insert(mp(--in[i], i));
        v.push_back(i);
    }
    int n = v.size();
    // for (auto &i : v) cout << i << ' ';
    // cout << endl;
    dp.reset();
    dp[0] = true;
    FOR(i, 0, n) {
        int I = 0;
        FOR(j, 0, i) if (EA.find(v[j] * MXN + v[i]) != EA.end()) I ^= (1 << j);
        for (int j = I; true; j = ((j - 1) & I)) {
            dp[j ^ (1 << i)] = dp[j];
            if (j == 0) break;
        }
    }
    int ans = 0;
    FOR(I, 0, 1 << n) if (dp[I]) ans = max(ans, POPCNT(I));
    return ans + 1;
}

void miku() {
    int c, x;
    cin >> n >> k;
    FOR(i, 0, n) {
        cin >> c;
        while (c--) {
            cin >> x;
            edge[i].push_back(x);
            EA.insert(i * MXN + x);
        }
    }
    FOR(i, 0, n) S.insert(mp(in[i] = edge[i].size(), i));
    FOR(i, 0, n) {
        pii p = *S.begin();
        S.erase(*S.begin());
        ans = max(ans, calc(p.sc));
    }
    cout << ans << '\n';
}

int32_t main() {
    cin.tie(0) -> sync_with_stdio(false);
    cin.exceptions(cin.failbit);
    miku();
    return 0;
}

Compilation message (stderr)

politicaldevelopment.cpp: In function 'long long int calc(long long int)':
politicaldevelopment.cpp:11:20: warning: statement has no effect [-Wunused-value]
   11 | #define debug(...) 39
      |                    ^~
politicaldevelopment.cpp:36:5: note: in expansion of macro 'debug'
   36 |     debug(id);
      |     ^~~~~

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