Submission #860657

#	Time	Username	Problem	Language	Result	Execution time	Memory
860657		clams	Bitaro’s Party (JOI18_bitaro)	C++17	14 / 100	55 ms	24404 KiB

bitaro

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

template <typename T>
bool mini(T& a, T b) {
    if (b < a) return a = b, true;
    return false;
}

template <typename T>
bool maxi(T& a, T b) {
    if (b > a) return a = b, true;
    return false;
}

const int N = 1e5 + 5;
const int M = 2e5 + 5;
const int Q = 1e5 + 5;

int n, m, q;
vector<int> adj[N], radj[N];
int t, y;
int c[N];
int f[N];
bool ded[N];

void solve() {
    cin >> t >> y;
    for (int i = 1; i <= y; i++) {
        cin >> c[i];
        ded[c[i]] = 1;
    }
    memset(f, -1, sizeof f);
    f[t] = 0;
    int ans = -1;
    for (int i = t; i >= 1; i--) {
        if (f[i] == -1) continue;
        if (!ded[i]) maxi(ans, f[i]);
        for (int v : radj[i]) {
            maxi(f[v], f[i] + 1);
        }
    }
    cout << ans;
}

signed main() {
    cin.tie(0)->sync_with_stdio(0);
    
    cin >> n >> m >> q;
    for (int i = 1; i <= m; i++) {
        int s, e;
        cin >> s >> e;
        adj[s].push_back(e);
        radj[e].push_back(s);
    }    
    assert(q == 1);
    while (q--) {
        solve();
    }
}

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