Submission #200822

#	Time	Username	Problem	Language	Result	Execution time	Memory
200822		ekrem	Bitaro’s Party (JOI18_bitaro)	C++98	0 / 100	5 ms	376 KiB

bitaro

#include <bits/stdc++.h>
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<ll, ll>    pll;
typedef pair<ull, ull>    pull;
typedef pair<ll, ll>  pii;
typedef pair<ld, ld>  pld;
ll n, m, q;
ll dis[2009][2009];
vector<ll> inc[2009];
ll nono[2009];
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);cout.tie(0);
     
    //freopen("in.txt", "r", stdin);                                                                                             
    //freopen("out.txt", "w", stdout);
 
    cin >> n >> m >> q;
    while(m--){
        ll a, b;
        cin >> a >> b;
        inc[b].pb(a);
    }
    for(ll i = 1; i <= n; ++i)
        for(ll j = 1; j <= n; ++j)
            dis[i][j] = -1e9;
     
    for(ll i = 1; i <= n; ++i)
        dis[i][i] = 0;
     
    for(ll i = 1; i <= n; ++i)
        for(auto u : inc[i])
            for(ll j = 1; j <= n; ++j)
                if(i != j)
                    dis[i][j] = max(dis[i][j], 1+dis[u][j]);
    while(q--){
        ll root;
        ll k;
        set<ll> tmp;
        cin >> root >> k;
        while(k--){
            ll ttt;
            cin >> ttt;
            nono[ttt] = 1;
        }
        ll ans = -1;
        for(ll i = 1; i <= n; ++i)
            if(!nono[i] && i != root)
                ans = max(ans, dis[root][i]);
        cout << ans << '\n';
        for(ll i = 1; i <= n; ++i)
            nono[i] = 0;
    }
 
}

• Subtask 1: 0 / 7
• Subtask 2: 0 / 7
• Subtask 3: 0 / 86