#include <fstream>
#include <iostream>
#include <queue>
using namespace std;

int a[101][101], c[101][101], f[101][101];
int viz[101], T[101];
int n, m, lung, minim;

ifstream fin("maxflow.in");
ofstream fout("maxflow.out");

struct arc { int n1, n2; };
arc drum[101];

int bf()
{
	int i, j;
	queue <int> q;
	fill(viz, viz + 101, 0); fill(T, T + 101, 0);
	q.push(1);
	viz[1] = 1;
	while (q.empty() != 1)
	{
		i = q.front();
		if (i == n)
			return 1;
		q.pop();
		for (j = 1; j <= n; j++)
		{
			if (viz[j] == 0 && c[i][j] - f[i][j] > 0)
			{//arc parcurs in sens direct
				viz[j] = 1;
				T[j] = i;
				q.push(j);
			}
			if (viz[j] == 0 && f[j][i] > 0)
			{//arc parcurs in sens invers
				viz[j] = 1;
				T[j] = i;
				q.push(j);
			}
		}
	}
	return 0;
}
void calcdrum()
{
	int i = 0, b = n, a;
	minim = 10000000;
	a = T[b];
	while (a != 0)
	{
		drum[i].n1 = a;
		drum[i].n2 = b;
		if (c[a][b] > f[a][b])
		{
			if (minim > c[a][b] - f[a][b])
				minim = c[a][b] - f[a][b];
		}
		else
			if (minim > f[b][a])
				minim = f[b][a];
		i++;
		b = a;
		a = T[b];
	}
	lung = i;
}
int main()
{
	int i, j, k, ok = 1;
	fin >> n >> m;
	for (i = 0; i < m; i++)
	{
		fin >> i >> j;
		fin >> c[i][j];
	}
	while (ok == 1)
	{
		ok = bf(); //returneaza 1 daca gaseste un drum
		if (ok == 1)
		{
			calcdrum(); //calculeaza si minimul
			//cout << "\n\ngasit un drum de lungime " << lung;
			//cout << " capacitate reziduala " << minim << endl;
			//cout << "format din arcele: ";
			for (k = 0; k < lung; k++)
			{
				i = drum[k].n1;
				j = drum[k].n2;
				//cout << i << '-' << j << " , ";
				if (c[i][j] - f[i][j] > 0)
					f[i][j] += minim;
				else
					f[j][i] -= minim;
			}
		}
	}
	int fluxmax = 0;
	for (i = 1; i <= n; i++)
		fluxmax += f[1][i];
	//cout << "\n\nflux maxim= " << fluxmax << endl;
	cout << fluxmax;
	//cout << "starea fiecarui arc:capacitate/flux\n";
	for (i = 1; i <= n; i++)
		for (j = 1; j <= n; j++)
			if (c[i][j] > 0)
			{
				//cout << '(' << i << '-' << j << "):";
				//cout << c[i][j] << '/' << f[i][j] << endl;
			}
	return 0;
}