import java.io.*;
import java.util.Arrays;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;
import java.util.Scanner;
import java.util.Scanner; // Import the Scanner class to read text files


public class Main {
    public static void main(String[] args) throws IOException {
        File inputFile = new File("maxflow.in");
        File outputFile = new File("maxflow.out");
        FileInputStream inputStream = new FileInputStream(inputFile);
        Scanner scanner = new Scanner(inputStream);
        FileOutputStream outputStream = new FileOutputStream(outputFile);
        PrintWriter writer = new PrintWriter(outputStream);
        TaskC solver = new TaskC();
        solver.solve( scanner, writer);
        writer.close();
        outputStream.close();
    }
}

class TaskC {
    public void solve(Scanner in, PrintWriter out) {
        int x , y , z , i , j ;
        int n = in.nextInt();
        int m = in.nextInt();
        int[][] c = new int[n + 2][n + 2];
        for ( i = 0 ; i < n ; ++ i )    {
            for ( j = 0 ; j < n ; ++ j )    {
                c [ i ][ j ] = 0 ;
            }
        }
        for ( i = 0 ; i < m ; ++ i )  {
            x = in.nextInt() ;
            y = in.nextInt() ;
            z = in.nextInt() ;
            c [ x ][ y ] = z ;
        }

        int[][] f = new int[n + 2][n + 2];
        out.print(flow(n, c, f, 1, n));
    }

    private int flow(int n, int[][] c, int[][] f, int s, int t) {
        boolean[] mark = new boolean[n];
        int res = 0;
        while (dfs(s, t, c, f, mark)) {
            ++res;
            Arrays.fill(mark, false);
        }
        return res;
    }

    private boolean dfs(int at, int t, int[][] c, int[][] f, boolean[] mark) {
        if (at == t) return true;
        if (mark[at]) return false;
        mark[at] = true;
        for (int i = 0; i < c.length; ++i) if (f[at][i] < c[at][i] && dfs(i, t, c, f, mark)) {
            ++f[at][i];
            --f[i][at];
            return true;
        }
        return false;
    }
}

class InputReader {
    public BufferedReader reader;
    public StringTokenizer tokenizer;

    public InputReader(InputStream stream) {
        reader = new BufferedReader(new InputStreamReader(stream), 32768);
        tokenizer = null;
    }

    public String next() {
        while (tokenizer == null || !tokenizer.hasMoreTokens()) {
            try {
                tokenizer = new StringTokenizer(reader.readLine());
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
        return tokenizer.nextToken();
    }

    public int nextInt() {
        return Integer.parseInt(next());
    }

}