#include <cstdio>
#include <vector>
#include <algorithm>
#include <queue>
#include <bitset>
#include <cstring>

#define Nmax 1005
#define INF 0x3f3f3f3f
#define iIT vector<int>::iterator

using namespace std;

int capacity[Nmax][Nmax];
int flow[Nmax][Nmax];
int tata[Nmax];
int N,M,FLOWmax;

vector<int> G[Nmax];
queue<int> Q;
bitset<Nmax> used;

inline void read()
{
    scanf("%d%d",&N,&M);
    int a,b,c;
    for(int i = 1; i <= M; ++i)
    {
        scanf("%d%d%d",&a,&b,&c);
        G[a].push_back(b);
        G[b].push_back(a);
        capacity[a][b] = c;
    }
}

inline bool BFS(int k)
{
    used = 0;
    used[ k ] = 1;
    Q.push(k);
    while(!Q.empty()){
        k = Q.front();Q.pop();
        for(iIT it = G[k].begin(); it != G[k].end(); ++it)
            if(!used[*it] && capacity[k][*it] > flow[k][*it]){
                used[*it] = 1;
                tata[*it] = k;
                Q.push(*it);
            }
    }
    return used[N];
}

inline void FLOW()
{
    int nodc,minflow;
    while(BFS(1))
    for(iIT it = G[N].begin(); it != G[N].end(); ++it)
    {
        if(flow[*it][N] == capacity[*it][N] || !used[N]) continue;
        minflow = INF;
        tata[N] = *it; /// venim din it
        for(nodc = N; nodc != 1; nodc = tata[nodc])
            minflow = min(minflow, capacity[tata[nodc]][nodc] - flow[tata[nodc]][nodc]);
        for(nodc = N; nodc != 1; nodc = tata[nodc]){
            flow[tata[nodc]][nodc] += minflow;
            flow[nodc][tata[nodc]] -= minflow;
        }
        FLOWmax += minflow;
    }
}

inline void print()
{
    printf("%d\n",FLOWmax);
    fclose(stdin);
    fclose(stdout);
}

int main()
{
    freopen("maxflow.in","r",stdin);
    freopen("maxflow.out","w",stdout);

    read();
    FLOW();
    print();

    return 0;
}