#include <fstream>
#include <iostream>
#include <vector>
#include <queue>
using namespace std;

ifstream in("maxflow.in");
ofstream out("maxflow.out");

const int N = 1e3, F = 1e5 + 1e4 + 1;
vector<pair<int, int>> lista_ad[N + 1];
int rf[N + 1][N + 1];
queue<int> q;
int parinte[N + 1];
bool vizitat[N + 1];

bool bfs(int s, int t, int n)
{
    for (int i = 1; i <= n; i++)
    {
        vizitat[i] = false;
        parinte[i] = 0;
    }

    vizitat[s] = true;
    parinte[s] = 0;
    q.push(s);

    while (!q.empty())
    {
        int curent = q.front();
        q.pop();

        for (pair<int, int> x : lista_ad[curent])
        {
            int v = x.first;

            if (!vizitat[v] && rf[curent][v] > 0)
            {
                vizitat[v] = true;
                parinte[v] = curent;
                q.push(v);
            }
        }
    }

    if (vizitat[t])
        return true;

    return false;
}

int flux_maxim(int s, int t, int n)
{
    // gasim fluxul maxim in retea
    int max_flow = 0;

    // initial valorile reziduale sunt chiar capacitatea muchiilor din retea
    for (int i = 1; i <= n; i++)
        for (pair<int, int> x : lista_ad[i])
            rf[i][x.first] = x.second;

    // cat timp mai gasim un s-t drum f-nesaturat
    while (bfs(s, t, n))
    {
        // parcurgem s-t drumul gasit si calculam minimul fluxului pe care putem
        // sa il bagam
        int nod = t, c_curent, c_drum = F + 1;
        while (parinte[nod] != 0)
        {
            c_curent = rf[parinte[nod]][nod];
            if (c_curent < c_drum)
                c_drum = c_curent;

            nod = parinte[nod];
        }

        // actualizam capacitatile reziduale
        nod = t;
        while (parinte[nod] != 0)
        {
            rf[parinte[nod]][nod] -= c_drum;
            rf[nod][parinte[nod]] += c_drum;

            nod = parinte[nod];
        }

        max_flow += c_drum;
    }

    return max_flow;
}

int main()
{
    int n, m;
    in >> n >> m;

    int u, v, c;
    for (int i = 0; i < m; i++)
    {
        in >> u >> v >> c;
        lista_ad[u].push_back({v, c});
        lista_ad[v].push_back({u, 0});
    }

    out << flux_maxim(1, n, n);
    return 0;
}