#include <stdio.h>
#include <fstream>
#include <vector>
#include <cstring>
using namespace std;
//ifstream cin("maxflow.in");
ofstream cout("maxflow.out");

struct celula{

int nod;
celula *next;
}*g[1001],*a;
int n,m,x,y,cost,i,flow;
int c[1001][1001];
int t[1001],q[1001];
bool viz[1001];

void update()
{
    int mini=2000000000;
    int aux=n;

    while(aux>1)
    {
        mini=min(mini,c[t[aux]][aux]);
        aux=t[aux];
    }

    flow+=mini;
    aux=n;

    while(aux>1)
    {
        c[t[aux]][aux]-=mini;
        c[aux][t[aux]]+=mini;
        aux=t[aux];
    }

}
bool bfs()
{
    q[1]=1;
    int l=1, r=1;
    int nod=1;
    int ok=0;

    memset(viz,0,sizeof(viz));
    viz[1]=1;

    while(l<=r)
    {
        nod=q[l];
        l++;

        for(celula *p=g[nod]; p!=NULL; p=p->next)
        {
            if(viz[p->nod]==0 && c[nod][p->nod]>0)
            {
                t[p->nod]=nod;
                if(p->nod==n) update(), ok=1;
                else
                q[++r]=p->nod, viz[p->nod]=1;
            }
        }
    }

    return ok;

}
int main()
{

    freopen("maxflow.in", "r",stdin);

    scanf("%d%d", &n, &m);
   // cin>>n>>m;
    for(i=1;i<=m;++i)
    {
        scanf("%d%d%d", &x, &y, &cost);
       // cin>>x>>y>>cost;
        c[x][y]=cost;

        a=new celula;
        a->nod=x;
        a->next=g[y];
        g[y]=a;

        a=new celula;
        a->nod=y;
        a->next=g[x];
        g[x]=a;

    }

    while(bfs())
    {

    }

    cout<<flow;

    return 0;
}