#include <algorithm>
#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
using namespace std;
ifstream in("maxflow.in");
ofstream out("maxflow.out");
const int maxn = 1005;
vector <int> v[maxn];
int dist[maxn];
int tata[maxn];
int sursa, destinatie;

struct muchie {
    int flux;
    int cap;
};
muchie M[maxn][maxn];

queue <int> q;
int n;

bool bfs()
{
    for(int i = 1; i <= n; i++)
        dist[i] = (1 << 30);
    dist[sursa] = 0;
    q.push(sursa);
    while(!q.empty())
    {
        int nod = q.front();
        q.pop();
        if(nod == destinatie)
            continue;
        for(auto it : v[nod])
        {
            if(dist[it] > dist[nod] + 1 && M[nod][it].flux < M[nod][it].cap)
            {
                dist[it] = dist[nod] + 1;
                tata[it] = nod;
                q.push(it);
            }
        }
    }
    if(dist[destinatie] == (1 << 30))
        return 0;
    return 1;
}

int main()
{
    int m;
    in >> n >> m;
    sursa = 1;
    destinatie = n;
    for(int i = 1; i <= m; i++)
    {
        int x, y, cap;
        in >> x >> y >> cap;
        v[x].push_back(y);
        v[y].push_back(x);
        M[x][y] = {0, cap};
    }
    while(bfs())
    {
        for(auto vec : v[destinatie])
        {
            if(dist[vec] == (1 << 30) || M[vec][destinatie].flux == M[vec][destinatie].cap)
                continue;
            tata[destinatie] = vec;
            int act = destinatie;
            vector <int> drum;
            while(tata[act] != 0)
            {
                drum.push_back(act);
                act = tata[act];
            }
            drum.push_back(act);
            reverse(drum.begin(), drum.end());
            int topush = (1 << 30);
            for(int i = 0; i < drum.size() - 1; i++)
                topush = min(topush, M[drum[i]][drum[i + 1]].cap - M[drum[i]][drum[i + 1]].flux);
            for(int i = 0; i < drum.size() - 1; i++)
                M[drum[i]][drum[i + 1]].flux += topush;
        }
    }
    int sol = 0;
    for(auto it : v[sursa])
        sol = sol + M[sursa][it].flux;
    out << sol << "\n";
    return 0;
}