#include <iostream>
#include <fstream>
#include <cstring>
#include <vector>
#include <queue>

using namespace std;
ifstream f("maxflow.in");
ofstream g("maxflow.out");
const int MaxN = 1005;
int n, m, cap[MaxN][MaxN], flow[MaxN][MaxN], from[MaxN], ok, maxfl = 0, added, np;
vector<int> gr[5 * MaxN];

bool bfs()
{
    queue<int> q;
    bool viz[MaxN];
    memset(viz, 0, sizeof(viz));
    viz[1] = 1;
    q.push(1);
    while (!q.empty() && !viz[n])
    {
        int node = q.front();
        q.pop();
        for (auto son: gr[node])
        {
            if (!viz[son] && flow[node][son] < cap[node][son])
            {
                viz[son] = 1;
                q.push(son);
                from[son] = node;
            }
        }
    }
    if (viz[n]) return 1;
    return 0;
}

int main()
{
    f >> n >> m;
    for (int i = 1; i <= m; ++i)
    {
        int x, y, c;
        f >> x >> y >> c;
        gr[x].push_back(y);
        cap[x][y] = c;
        gr[y].push_back(x);
        ///cap[y][x] = 0;
    }
    ok = 1;
    added = 1;
    while (bfs())
    {
        added = 1 << 30;
        int node = n;
        while (from[node])
        {
            added = min(added, cap[from[node]][node] - flow[from[node]][node]);
            node = from[node];
        }
        node = n;
        while (from[node])
        {
            flow[from[node]][node] += added;
            flow[node][from[node]] -= added;
            node = from[node];
        }
        maxfl += added;
        //memset(from, 0, sizeof(from));
    }
    g << maxfl << '\n';
    return 0;
}