Leetcode-2039

The Time When the Network Becomes Idle

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#include <iostream>
#include <vector>
#include <queue>

const int INF = 0x3fff'ffff;

class Solution {
public:
    int networkBecomesIdle(std::vector<std::vector<int>>& edges, std::vector<int>& patience) {
        int n = patience.size();
        std::vector<int> dist(n, INF);
        std::vector<std::vector<int>> adj(n);
        for (auto& e : edges) {
            adj[e[0]].push_back(e[1]);
            adj[e[1]].push_back(e[0]);
        }
        
        std::queue<int> q;
        dist[0] = 0;
        q.push(0);
        while (!q.empty()) {
            int u = q.front();
            int d = dist[u];
            q.pop();
            for (auto& v : adj[u]) {
                if (dist[v] == INF) {
                    dist[v] = d + 1;
                    q.push(v);
                }
            }
        }
        
        int res = 0;
        for (int i = 1; i < n; ++i) {
            res = std::max(res, (2 * dist[i] - 1) / patience[i] * patience[i] + 2 * dist[i] + 1);
        }
        return res;
    }
};

Leetcode-2039

Licensed under CC BY-NC-SA 4.0