# include <fstream>
using namespace std;
int c[1003][1003], n, t[1003], fmax;

void read ()
{
	int m;
	ifstream fin ("maxflow.in");
	fin>>n>>m;
	for (;m;--m)
	{
		int x, y, co;
		fin>>x>>y>>co;
		c[x][y]=co;
	}
}

struct nod {
	int info;
	nod *next;};

int bfs (int s, int d)
{
	nod *st, *dr, *q;
	int k;
	for (int i=1;i<=n;i++)
		t[i]=-1;
	st=dr=new nod;
	st->next=NULL;
	st->info=s;
	t[s]=0;
	while (st)
	{
		k=st->info;
		for (int i=2;i<=n;i++)
			if (c[k][i]>0 && t[i]==-1)
			{
				t[i]=k;
				q=new nod;
				q->next=NULL;
				q->info=i;
				dr->next=q;
				dr=q;
				if (i==d)
					return 1;
			}
		q=st;
		st=st->next;
		delete q;
	}
	return 0;
}				

void EK ()
{
	int cmin;
	while (bfs(1,n))
	{
		cmin=1000000000;
		for (int i=n;t[i];i=t[i])
			if (cmin>c[t[i]][i])
				cmin=c[t[i]][i];
		for (int i=n;t[i];i=t[i])
		{
			c[t[i]][i]-=cmin;
			c[i][t[i]]+=cmin;
		}
		fmax+=cmin;
	}
}
		

int main ()
{
	read ();
	EK();	
	ofstream fout ("maxflow.out");
	fout<<fmax;
	return 0;
}