Submission #560405

#	Time	Username	Problem	Language	Result	Execution time	Memory
560405		colossal_pepe	Bitaro’s Party (JOI18_bitaro)	C++17	0 / 100	1 ms	384 KiB

bitaro

#include <iostream>
#include <vector>
#include <cstring>
using namespace std;

int n, m, q, t, y;
vector<vector<int>> g;

void brutus(int u, int dp[]) {
    if (u > t or dp[u] != -1) return;
    for (int v : g[u]) {
        brutus(v, dp);
        dp[u] = max(dp[u], dp[v] + 1);
    }
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin >> n >> m >> q;
    g.resize(n);
    while (m--) {
        int u, v;
        cin >> u >> v;
        u--, v--;
        g[u].push_back(v);
    }
    cin >> t >> y;
    t--;
    int dp[n];
    memset(dp, -1, sizeof(dp));
    dp[t] = 0;
    for (int i = 0; i < n; i++) {
        if (dp[i] == -1) brutus(i, dp);
    }
    bool absent[n];
    memset(absent, 0, sizeof(absent));
    for (int i = 0; i < y; i++) {
        int c;
        cin >> c;
        c--;
        absent[c] = 1;
    }
    int ans = -1;
    for (int i = 0; i < n; i++) {
        if (not absent[i]) ans = max(ans, dp[i]);
    }
    cout << ans << '\n';
    return 0;
}

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