Method add_edge

HackerEarth_problems/New Friends/solution.cpp:59–65

    }
 
    void add_edge(int v, int u, long long cap) {
        edges.emplace_back(v, u, cap);
        edges.emplace_back(u, v, 0);
        adj[v].push_back(m);
        adj[u].push_back(m + 1);
        m += 2;
    }
 
    bool bfs() {
        while (!q.empty()) {