Submission #567097

#	Time	Username	Problem	Language	Result	Execution time	Memory
567097		shrimb	Bitaro’s Party (JOI18_bitaro)	C++17	14 / 100	2055 ms	22184 KiB

bitaro

#pragma GCC optimize ("Ofast")
#pragma GCC target ("avx,avx2,fma")

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

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;

template<class x>
using ordered_set = tree<x, null_type,less<x>, rb_tree_tag,tree_order_statistics_node_update>;

#define int long long
#define endl '\n'
#define mod 1000000007
//\
#define mod 1686876991
const int maxn = 200001;
int n, m, q;
vector<int> adj[maxn], radj[maxn];
int dp[maxn];

signed main () {
    cin.tie(0)->sync_with_stdio(0);

    cin >> n >> m >> q;
    for (int i = 0 ; i < m ;  i++) {
        int a, b;
        cin >> a >> b;
        adj[a].push_back(b);
        radj[b].push_back(a);
    }

    while (q--) {
        int t, y, c;
        cin >> t >> y;
        memset(dp, 0, sizeof dp);
        for (int i = 0 ; i < y ; i++) cin >> c, dp[c] = -1e8;
        for (int i = 1 ; i <= n ; i++) {
            for (int j : radj[i]) {
                dp[i] = max(dp[i], dp[j] + 1);
            }
        }
        if (dp[t] < 0) cout << -1 << endl;
        else cout << dp[t] << endl;
    }
}

Compilation message (stderr)

bitaro.cpp:17:1: warning: multi-line comment [-Wcomment]
   17 | //\
      | ^

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