#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define loop(i,a,b) for(ll i=(a);i<ll(b);i++)
#define rep(i,b) loop(i,0,b)

typedef int Capacity;
typedef int Weight;
struct Edge {
    int src, dst;
    Capacity cap;
    Edge(int src_, int dst_, Capacity cap_) :
        src(src_), dst(dst_), cap(cap_) { }
};
typedef vector<Edge> Edges;
typedef vector<Edges> Graph;
typedef vector<Weight> Array;
typedef vector<Array> Matrix;

struct FordFulkerson {
    typedef vector<vector<Capacity>> Matrix;
    int n, t;
    vector<bool> vis;
    vector<vector<Capacity>> cap, flow;
    vector<vector<int>> g;
    Capacity inf;
    FordFulkerson(int n)
        : n(n), cap(n, vector<Capacity>(n)),
          flow(n, vector<Capacity>(n)), g(n, vector<int>()),
          inf(numeric_limits<Capacity>::max()/8){}
    FordFulkerson(const Graph &graph){
        *this = FordFulkerson(graph.size());
        rep(i,n) for(auto &e : graph[i]) addEdge(e.src, e.dst, e.cap);
    }
    void addEdge(int u, int v, Capacity c){
        cap[u][v] += c; cap[v][u] += c; flow[v][u] += c;
        g[u].push_back(v); g[v].push_back(u);
    }
    Capacity solve(int s, int t){
        this->t = t;
        Capacity res = 0, inc = 1;
        while(inc > 0){
            vis.assign(n, false);
            res += (inc = augment(s, inf));
        }
        return res;
    }
    Capacity augment(const int &v, const Capacity &lim){
        vis[v] = true;
        if(v == t) return lim;
        for(const int &i : g[v]){
            if(vis[i] || flow[v][i] == cap[v][i]) continue;
            Capacity f = augment(i, min(lim, cap[v][i] - flow[v][i]));
            flow[v][i] += f;
            flow[i][v] -= f;
            if(f) return f;
        }
        return 0;
    }
};

struct EdmondsKerp {
    int n;
    vector<int> prev, dist;
    vector<vector<Capacity>> cap, flow;
    vector<vector<int>> g;
    Capacity inf;
    EdmondsKerp(int n)
        : n(n), cap(n, vector<Capacity>(n)), flow(n, vector<Capacity>(n)),
          g(n, vector<int>()), inf(numeric_limits<Capacity>::max()/8){}
    EdmondsKerp(const Graph &graph){
        *this = EdmondsKerp(graph.size());
        rep(i,n) for(auto &e : graph[i]) addEdge(e.src, e.dst, e.cap);
    }
    void addEdge(int u, int v, Capacity c){
        cap[u][v] += c; cap[v][u] += c; flow[v][u] += c;
        g[u].push_back(v); g[v].push_back(u);
    }
    Capacity solve(int s, int t){
        Capacity res = 0, aug = 1;
        while(aug > 0){
            prev.assign(n, -1); dist.assign(n, inf); dist[s] = 0;
            res += (aug = augment(s,t));
        }
        return res;
    }
    Capacity augment(int s, int t){
        queue<pair<int,Capacity>> q;
        q.emplace(s,inf);
        Capacity aug = 0;
        while(q.size()){
            int v; Capacity f;
            tie(v,f) = q.front(); q.pop();
            if(v == t){ aug = f; break; }
            for(const int& d : g[v]){
                if(dist[d] <= dist[v] + 1 || cap[v][d] - flow[v][d] == 0) continue;
                dist[d] = dist[v] + 1; prev[d] = v;
                q.emplace(d, min(f, cap[v][d] - flow[v][d]));
            }
        }
        if(aug == 0) return 0;
        int c = t;
        while(c != s){
            int p = prev[c];
            flow[p][c] += aug; flow[c][p] -= aug;
            c = p;
        }
        return aug;
    }
};

int main(){
    int N,M;
    cin >> N >> M;
    Graph g(N);
    rep(i,M){
        int a,b,c;
        cin >> a >> b >> c;
        g[a].emplace_back(a,b,c);
    }
    EdmondsKerp ek(g);
    cout << ek.solve(0,N-1) << endl;
}

Measured memory_bytes: 1352