#include <iostream>
#include <cstdio>
#include <vector>
#define inf 0x7fffffff
using namespace std;

struct muchie
{
    int y,c;
};
int n,m;
vector <muchie> g[1010];
vector <int> sir[1010];

void citire()
{
    freopen("maxflow.in","r",stdin);
    scanf("%d %d",&n,&m);
    for(int i=0; i<m; i++)
    {
        muchie aux;
        int x;
        scanf("%d %d %d",&x,&aux.y,&aux.c);
        g[x].push_back(aux);
    }

}
int sum;
int ok=0,k;


int minim(int a, int b)
{
    if(a<b)
        return a;
    return b;
}
int l=0;
void DFS(int x, int m)
{
    if(x!=n)
        for(int i=0; i<g[x].size(); i++)
        {
            DFS(g[x][i].y,minim(g[x][i].c,m));
            if(ok==1)
                g[x][i].c-=l;
            if(!g[x][i].c)
                g[x].erase(g[x].begin()+i);
        }
    else
    {
        ok=1;
        sum+=m;
        l=m;
    }
}


int main()
{
    citire();
    do
    {
        ok=0;
        DFS(1,inf);

    }
    while(ok==1);
    freopen("maxflow.out","w",stdout);
    printf("%d",sum);
    return 0;
}