#include <bits/stdc++.h>
using namespace std;
ifstream f("maxflow.in");
ofstream g("maxflow.out");
int a[1001][1001], flux[1001][1001], n, m;
void cit()
{
    f >> n >> m;
    for(int i = 1; i <= m; i++)
    {
        int x, y, k;
        f >> x >> y >> k;
        a[x][y] = k;
        flux[x][y] = k; 
    }
}
vector <int> t(1001, 0);
void bfs()
{
    queue <int> q;
    q.push(1);
    t[1] = -1;
    while(!q.empty())
    {
        int nod = q.front();
        q.pop();
        for(int i = 1;i <= m; i++)
        {
            if(flux[nod][i] != 0 && !t[i])
            {
                q.push(i);
                t[i] = nod;
            }
        }
    }
}
bool areDrum()
{
    fill(t.begin(), t.end(), 0);
    bfs();
    if(t[n] != 0)
        return true;
    return false;
}
void rez()
{
    int sum = 0;
    while(areDrum())
    {
        int capmin = INT_MAX;
        for(int i = n; i != 1; i = t[i])
        {
            capmin = min(capmin, flux[t[i]][i]);
        }
        for(int i = n; i != 1; i = t[i])
        {
            flux[t[i]][i] -= capmin;
            flux[i][t[i]] += capmin;
        }
        sum += capmin;
    }
    g << sum;
}
int main()
{
    cit();
    rez();
    return 0;
}