#include <fstream>
#include <vector>
#include <queue>

using namespace std;

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

#define NMAX 1005

vector<int> G[NMAX];
int capacitate[NMAX][NMAX];
int parent[NMAX];
int viz[NMAX];

#define INF (1 << 30)
int n;

int bfs ( int source, int destination ) {
    int cur, flow;
    fill ( viz, viz + n + 1, 0 );
    viz[source] = 1;
    queue<int> q;
    q.push(source);
    while ( !q.empty() ) {
        cur = q.front();
        q.pop();
        if ( cur != destination ) {
            for (int copil: G[cur]) {
                if (viz[copil] == 0 && capacitate[cur][copil]) {
                    viz[copil] = 1;
                    parent[copil] = cur;
                    q.push(copil);
                }
            }
        }
    }
    return viz[destination];
}

int max_flow ( int source, int destination ) {
    int flow, new_flow, cur, prev;
    flow = 0;
    new_flow = 1;
    while ( bfs( source, destination ) ) {
        for ( int copil : G[destination] ) {
            if (viz[copil] && capacitate[copil][destination]) {
                cur = destination;
                new_flow = INF;
                while (cur != source) {
                    prev = parent[cur];
                    new_flow = min(new_flow, capacitate[prev][cur]);
                    cur = prev;
                }
                if (new_flow) {
                    cur = destination;
                    while (cur != source) {
                        prev = parent[cur];
                        capacitate[prev][cur] -= new_flow;
                        capacitate[cur][prev] += new_flow;
                        cur = prev;
                    }
                    flow += new_flow;
                }
            }
        }
    }
    return flow;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int m, i, x, y, c;
    cin >> n >> m;
    for ( i = 1; i <= m; i++ ) {
        cin >> x >> y >> c;
        G[x].push_back(y);
        G[y].push_back(x);
        capacitate[x][y] = c;
    }
    cout << max_flow(1, n) << "\n";
    return 0;
}