Method get_adj

test/data/flow_networks.h:9–19

    int maxflow;

    vector<vector<int>> get_adj() {
        int n = capacity.size();
        vector<vector<int>> adj(n);
        for (int i = 0; i < n; i++) {
            for (int j = 0; j < n; j++) {
                if (capacity[i][j] || capacity[j][i])
                    adj[i].push_back(j);
            }
        }
        return adj;
    }
};

vector<FlowNetwork> flow_networks = {