#include <fstream>
#include <queue>
#include <bitset>
#include <vector>
#define INFINIT 0x3f3f3f3f
#define MAXN 1005
#include <cstring>
using namespace std;

bool marcat[MAXN];
queue<int> coada;
vector<int> graf[MAXN];
int n, m, capacitate[MAXN][MAXN], flux[MAXN][MAXN], tata[MAXN];

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

int parcurgere()
{
    memset(marcat,0,MAXN);
    coada.push(1);
    marcat[1]=1;
    while(!coada.empty())
    {
        int nod = coada.front();
        coada.pop();
        if(nod!=n)
        {
            for(int j=0;j<graf[nod].size();j++)
            {
                int vecin = graf[nod][j];
                if(!marcat[vecin] && capacitate[nod][vecin] != flux[nod][vecin])
                {
                    marcat[vecin] = 1;
                    tata[vecin] = nod;
                    coada.push(vecin);
                }
            }
        }
    }
    return marcat[n];
}

int Flux;

void citire()
{
    in>>n>>m;
    for(int i=1; i<=m; i++)
    {
        int a, b, cp;
        in>>a>>b>>cp;
        capacitate[a][b] = cp;
        graf[a].push_back(b);
        graf[b].push_back(a);
    }
}

int main()
{
    for(citire(); parcurgere();)
    {
        int minim = INFINIT;
        int i=n;
        while(i!=1)
        {
            minim = min(minim,capacitate[tata[i]][i] - flux[tata[i]][i]);
            i = tata[i];
        }
        {
            int i = n;
            while(i!=1)
            {
                flux[i][tata[i]] -= minim;
                flux[tata[i]][i] += minim;
                i = tata[i];
            }

        }
        Flux += minim;
    }

    out<<Flux;

    return 0;
}