#include <bits/stdc++.h>
#define inf 0x7fffffff

FILE *fin = freopen("maxflow.in", "r", stdin);
FILE *fout = freopen("maxflow.out", "w", stdout);

using namespace std;
class Graph
{
    int V;
    int *par, **r;
public:
    Graph(int V);

    void BFS(int S, int D);
    void addEdge(int u, int v, int cap);
    int maxFlow(int S, int D);

};
Graph::Graph(int V)
{
    this->V = V;
    par = new int [V];
    r = new int *[V];
    //f = new int *[V];
    for (int i = 0; i < V; ++ i)
    {
        r[i] = new int[V];
        //f[i] = new int[V];

        for (int j = 0; j < V; ++ j)
            //c[i][j] =
            r[i][j] = 0;
    }
}


void Graph::addEdge(int u, int v, int cap)
{
    r[u][v] = cap;
}

void Graph::BFS(int S, int D)
{
    queue < short int > Q;
    while (!Q.empty()) Q.pop();
    for (int i = 0; i < V; ++ i)
        par[i] = -1;
    Q.push(S);
    par[S] = S;
    par[D] = D;
    while (!Q.empty())
    {
        int x = Q.front();
        Q.pop();
        for (int i = 0; i < V - 1; ++ i)
            if (r[x][i] > 0 && par[i] == -1)
            {
                par[i] = x;
                Q.push(i);
            }
    }
}
int Graph::maxFlow(int S, int D)
{
    int flow = 0;
    bool ok = true;
    while (ok)
    {
        BFS(0, V - 1);
        ok = false;
        for(int u = 0; u < V - 1; u++)
            if (r[u][D] > 0 && par[u] != -1)
            {
                ok = true;
                par[D] = u;
                int nod = D, cap = inf;
                while (nod != S)
                {
                    cap = min(cap, r[par[nod]][nod]);
                    nod = par[nod];
                }
                nod = D;
                flow += cap;
                while (nod != S)
                {
                    r[par[nod]][nod] -= cap;
                    r[nod][par[nod]] += cap;
                    nod = par[nod];
                }
            }
    }
    return flow;
}

int main()
{
    int n, m;
    scanf("%d%d", &n, &m);
    Graph g(n);
    for (int i = 1; i <= m; ++ i)
    {
        int u, v, cap;
        scanf("%d%d%d", &u, &v, &cap);
        -- u;
        -- v;
        g.addEdge(u, v, cap);
    }

    printf("%d\n", g.maxFlow(0, n - 1));
    return 0;
}