#include <bits/stdc++.h>

#define FOR(i,a,b) for(int i= (a); i<((int)b); ++i)
#define RFOR(i,a) for(int i=(a); i >= 0; --i)
#define FOE(i,a) for(auto i : a)
#define ALL(c) (c).begin(), (c).end()
#define RALL(c) (c).rbegin(), (c).rend()
#define DUMP(x)  cerr << #x << " = " << (x) << endl;
#define SUM(x) std::accumulate(ALL(x), 0LL)
#define MIN(v) *std::min_element(v.begin(), v.end())
#define MAX(v) *std::max_element(v.begin(), v.end())
#define EXIST(v,x) (std::find(v.begin(), v.end(), x) != v.end())
#define BIT(n) (1LL<<(n))
#define UNIQUE(v) v.erase(unique(v.begin(), v.end()), v.end());

typedef long long LL;
template<typename T> using V = std::vector<T>;
template<typename T> using VV = std::vector<std::vector<T>>;
template<typename T> using VVV = std::vector<std::vector<std::vector<T>>>;
template<class T> inline T ceil(T a, T b) { return (a + b - 1) / b; }
template<class T> inline void print(T x) { std::cout << x << std::endl; }
template<class T> inline bool inside(T y, T x, T H, T W) {return 0 <= y and y < H and 0 <= x and x < W; }
inline double distance(double y1, double x1, double y2, double x2) { return sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2)); }

const int INF = 1L << 30;
const double EPS = 1e-9;
const std::string YES = "YES", Yes = "Yes", NO = "NO", No = "No";
const std::vector<int> dy = { 0, 1, 0, -1 }, dx = { 1, 0, -1, 0 };    // 4近傍（右, 下, 左, 上）

using namespace std;

struct Edge {
    const int to;
    const int rev;
    int flow;
    const int capacity;
    const bool is_rev;
    Edge(int to, int rev, int flow, int capacity, bool is_rev) : to(to), rev(rev), flow(flow), capacity(capacity), is_rev(is_rev){}
};

struct Vertex {
    int h;
    int e_flow;
    Vertex(int h, int e_flow) : h(h), e_flow(e_flow){}
};

class Graph {
public:
    const int V; // No. of vertices
    vector<Vertex> ver;
    vector<vector<Edge>> graph;

    Graph(int V) : V(V) {
        for (int i = 0; i < V; i++) {
            ver.emplace_back(Vertex(0, 0));
        }
        graph.resize(V);
    }

    void addEdge(int from, int to, int capacity) {
        graph[from].emplace_back(Edge(to, graph[to].size(), 0, capacity, false));
        graph[to].emplace_back(Edge(from, graph[from].size() - 1, capacity, capacity, true));
    }

    void preflow(int s) {
        ver[s].h = (int)ver.size();

        for (Edge &edge : graph[s]) {
            if (edge.is_rev) { continue; }
            edge.flow = edge.capacity;
            ver[edge.to].e_flow += edge.flow;
            graph[edge.to][edge.rev].flow = 0;
//            graph[edge.to].emplace_back(Edge(s, -1, edge.capacity - edge.flow, edge.capacity));
//            assert(edge.capacity - edge.flow == 0);
        }
    }

    int overFlowVertex(const vector<Vertex> &ver) {
        for (int i = 1; i < ver.size() - 1; i++) {
            if (ver[i].e_flow > 0) {
                return i;
            }
        }
        return -1;
    }

    void updateReverseEdgeFlow(int from, int to, int flow) {


        for (Edge &edge : graph[to]) {
            if (edge.to == from) {
                return;
            }
        }
        assert(false);
        auto e = graph[from][to];
        graph[to].emplace_back(Edge(from, -1, e.capacity, e.capacity, true));
    }

    // fromから他のノードにpushする
    bool push(int from) {
        for (Edge &edge : graph[from]) {
            if (edge.flow == edge.capacity) { continue; }

            if (ver[from].h > ver[edge.to].h) {
                int flow = min(edge.capacity - edge.flow, ver[from].e_flow);
                ver[from].e_flow -= flow;
                ver[edge.to].e_flow += flow;
                edge.flow += flow;

//                updateReverseEdgeFlow(from, edge.to, flow);
                graph[edge.to][edge.rev].flow -= flow;
                return true;
            }
        }
        return false;
    }

    void relabel(int u) {
        int mh = INT_MAX;
        for (const Edge &edge : graph[u]) {
            if (edge.flow == edge.capacity) { continue; }

            if (ver[edge.to].h < mh) {
                mh = ver[edge.to].h;
                ver[u].h = mh + 1;
            }
        }
    }

    int maxFlow(int s, int t) {
        preflow(s);
        while (overFlowVertex(ver) != -1) {
            int u = overFlowVertex(ver);
            if (!push(u))
                relabel(u);
        }
        return ver.back().e_flow;
    }
};

int main() {
    int V, E;
    cin >> V >> E;
    Graph ff(V);
    for (int i = 0; i < E; i++) {
        int u, v, c;
        cin >> u >> v >> c;
        ff.addEdge(u, v, c);
    }

    cout << ff.maxFlow(0, V - 1) << endl;
    return 0;
}


Measured memory_bytes: 3256