Microservice hell

#include <iostream>
#include <algorithm>
#include <queue>
using namespace std;
typedef long long ll;

void topological_sort(const vector<vector<long long>> &adj, vector<long long> &order) {
    int n = adj.size();
    vector<long long> indegree(n, 0);

    for (int u = 0; u < n; u++) {
        for (int v : adj[u]) {
            indegree[v]++;
        }
    }

    queue<int> q;

    for (int i = 0; i < n; i++) {
        if (indegree[i] == 0) q.push(i);
    }

    order.reserve(n);

    while (!q.empty()) {
        int u = q.front();
        q.pop();
        order.push_back(u);


        for (int v : adj[u]) {
            indegree[v]--;
            if (indegree[v] == 0) q.push(v);
        }
    }


    if ((int)order.size() != n) {
        //cout << "NO" << endl;
        order = {-1};
        return ;

    }


}

int main() {
    ll n, m, x;
    cin >> n >> m >> x;
    vector<ll> dp(n+1, 0);
    ll max = 0;
    vector<vector<ll>> adj(n+1);
    vector<pair<ll, ll>> pairs(m+1);
    for(int i = 0; i < m; i++){
        int a,b;
        cin >> a >> b;
        dp[a] += 1;
        adj[a].push_back(b);
        pairs[i+1] = {a,b};
    }
    for(int i = 1; i <= n; i++){
        dp[pairs[i].first] += dp[pairs[i].second];
        if(dp[pairs[i].first] > max) max = dp[pairs[i].first];
    }
    max++;
        
    vector<ll> res ;
    topological_sort(adj, res);
    if(res[0] == -1) cout << "NO" << endl;
    else if (max <= x) cout << "YES" << endl;
    else cout << "NO" << endl;

}

Test 1

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Test 2

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