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답안 #963259

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
963259 2024-04-14T19:36:35 Z TimAni Bitaro’s Party (JOI18_bitaro) C++17
7 / 100
 2000 ms 34212 KB 
//start-time: 2024-04-14 19:39:32
#include <bits/stdc++.h>

using namespace std;
using ll = long long;

void solve(){
    ll n, m, q;
    cin >> n >> m >> q;
    vector<vector<ll>> g(n);
    vector<vector<ll>> gR(n);
    for(ll i = 0; i < m; i++){
        ll u, v;
        cin >> u >> v;
        u--; v--;
        g[u].push_back(v);
        gR[v].push_back(u);
    }
    
    vector<ll> vis(n), topo;
    auto dfs = [&](ll u, auto&&dfs) -> void {
        vis[u] = 1;
        for(auto v : g[u]){
            if(!vis[v]){
                dfs(v, dfs);
            }
        }
        vis[u] = 2;
        topo.push_back(u);
    };

    for(int i = 0; i < n; i++){
        if(vis[i] == 0){
            dfs(i, dfs);
        }
    }

    reverse(topo.begin(), topo.end());
    
    vector<set<array<ll, 2>>> dp(n);
    //vector<bitset<100'001>> cnt(n);
    map<int, map<int, ll>> mp;
    for(auto el : topo){
        dp[el].insert({0, el});
        mp[el][el] = 0;
        //cnt[el][el] = 1;
    }
    
    const ll w = round(sqrt(100000)) + 1;

    for(auto u : topo){
        for(auto v : gR[u]){
            for(auto [val, i] : dp[v]){
                //cnt[u] |= cnt[v];
                ll o = val + 1;
                if(mp[u][i]) {
                    o = max(o, mp[u][i]);
                    dp[u].erase({mp[u][i], i});
                }
                
                mp[u][i] = o;
                dp[u].insert({o, i});
                if(dp[u].size() > w){
                    auto [V, I] = *dp[u].begin();
                    dp[u].erase(dp[u].begin());
                    mp[u][I] = 0;
                }
            }
        }
    }

    for(ll i = 0; i < q; i++){
        ll u, y;
        cin >> u >> y;
        u--;
        bitset<100'001> c;
        for(ll j = 0; j < y; j++){
            ll a; cin >> a;
            c[--a] = 1;
        }

        //if((cnt[u] & c) == cnt[u]){
            //cout << -1 << endl;
            //continue;
        //}

        ll ans = -1;
        if(y < w){
            set<array<ll, 2>> ms = dp[u];
            for(auto [v, i] : ms){
                if(!c[i]){
                    ans = max(ans, v);
                }
            }
        }
        else{
            vector<int> naive(n);
            for(auto v : topo){
                naive[v] = c[v] ? -1 : 0;
                for(auto el : gR[v]){
                    naive[v] = max(naive[v], naive[el] + (naive[el] != -1));
                }
            }
            ans = naive[u];
        }
        
            //for(auto el : naive){
                //cout << el << ' ';
            //}
            //cout << endl;
        cout << ans << endl;
    }
}

int main() {
    cin.tie(0)->sync_with_stdio(0);
    ll T = 1;
    //cin >> T;
    while(T--) solve();
    return 0;
}

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 356 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 20 ms 5468 KB Output is correct
6 Correct 20 ms 5464 KB Output is correct
7 Correct 19 ms 4956 KB Output is correct
8 Correct 150 ms 34116 KB Output is correct
9 Correct 150 ms 34212 KB Output is correct
10 Correct 167 ms 34040 KB Output is correct
11 Correct 163 ms 30088 KB Output is correct
12 Correct 57 ms 14440 KB Output is correct
13 Correct 162 ms 28816 KB Output is correct
14 Correct 135 ms 20216 KB Output is correct
15 Correct 68 ms 10580 KB Output is correct
16 Correct 121 ms 19792 KB Output is correct
17 Correct 116 ms 22608 KB Output is correct
18 Correct 62 ms 12624 KB Output is correct
19 Correct 122 ms 22932 KB Output is correct

Subtask #2
0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 356 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 20 ms 5468 KB Output is correct
6 Correct 20 ms 5464 KB Output is correct
7 Correct 19 ms 4956 KB Output is correct
8 Correct 150 ms 34116 KB Output is correct
9 Correct 150 ms 34212 KB Output is correct
10 Correct 167 ms 34040 KB Output is correct
11 Correct 163 ms 30088 KB Output is correct
12 Correct 57 ms 14440 KB Output is correct
13 Correct 162 ms 28816 KB Output is correct
14 Correct 135 ms 20216 KB Output is correct
15 Correct 68 ms 10580 KB Output is correct
16 Correct 121 ms 19792 KB Output is correct
17 Correct 116 ms 22608 KB Output is correct
18 Correct 62 ms 12624 KB Output is correct
19 Correct 122 ms 22932 KB Output is correct
20 Execution timed out 2037 ms 13368 KB Time limit exceeded
21 Halted 0 ms 0 KB -

Subtask #3
0 / 86.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 356 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 20 ms 5468 KB Output is correct
6 Correct 20 ms 5464 KB Output is correct
7 Correct 19 ms 4956 KB Output is correct
8 Correct 150 ms 34116 KB Output is correct
9 Correct 150 ms 34212 KB Output is correct
10 Correct 167 ms 34040 KB Output is correct
11 Correct 163 ms 30088 KB Output is correct
12 Correct 57 ms 14440 KB Output is correct
13 Correct 162 ms 28816 KB Output is correct
14 Correct 135 ms 20216 KB Output is correct
15 Correct 68 ms 10580 KB Output is correct
16 Correct 121 ms 19792 KB Output is correct
17 Correct 116 ms 22608 KB Output is correct
18 Correct 62 ms 12624 KB Output is correct
19 Correct 122 ms 22932 KB Output is correct
20 Execution timed out 2037 ms 13368 KB Time limit exceeded
21 Halted 0 ms 0 KB -