#include <iostream>
#include <string>
#include <vector>
#include <iomanip>
#include <cmath>
#include <queue>
#include <algorithm>
#include <map>

using namespace std;

#define pb push_back
#define mp make_pair
#define all(x) x.begin(),x.end()

typedef long long ll;

const int N = 110, M = N*(N-1);
const ll INF = 1e18;

int n, m;
int cap[2*M];
int dest[2*M];
int link[2*M];
int head[N];
int last[N];

int cnt = 0;
int s, t;

void add_arc(int i, int j, int c) {
    cap[cnt] = c;
    dest[cnt] = j;
    link[cnt] = -1;
    if(head[i] == -1)
        head[i] = cnt;
    else {
        int arc = last[i];
        link[arc] = cnt;
    }
    last[i] = cnt;
    cnt++;

    cap[cnt] = 0;
    dest[cnt] = i;
    link[cnt] = -1;
    if(head[j] == -1) head[j] = cnt;
    else {
        int arc = last[j];
        link[arc] = cnt;
    }
    last[j] = cnt;
    cnt++;
}

int level[N];
int q[N];

bool bfs() {
    int qh = 0, qt = 0;
    fill(level, level + N, -1);
    level[s] = 0;
    q[qt++] = s;

    while(qt > qh) {
        int v = q[qh++];
        for(int arc = head[v]; arc != -1; arc = link[arc]) {
            int u = dest[arc], c = cap[arc];
            if(level[u] == -1 && c > 0) {
                q[qt++] = u;
                level[u] = level[v] + 1;
            }
        }
    }
    return level[t] != -1;
}

inline ll dfs(int v = s, ll flow = INF) {
    if(!flow) return 0LL;
    if(v == t) return flow;
    for(int arc = head[v]; arc != -1; arc = link[arc]) {
        int u = dest[arc], c = cap[arc];
        if(level[u] == level[v] + 1) {
            ll pushed = dfs(u, min(flow, (ll)c));
            if(pushed) {
                cap[arc] -= pushed;
                cap[arc^1] += pushed;
                return pushed;
            }
        }
    }

    return 0;
}

void init() {
    fill(head, head + N, -1);
}

int main() {
    ios_base::sync_with_stdio(false);

    // freopen("in.txt", "r", stdin);
    init();
    cin >>n >>m;
    s = 0, t = n - 1;

    for(int i = 0; i < m; i++) {
        int a, b, c;
        cin >>a >>b >>c;
        a--, b--;
        add_arc(a, b, c);
        add_arc(b, a, c);
    }

    ll pushed = 0;
    while(bfs()) {
        pushed += dfs();
    }

    cout <<pushed <<endl;

    return 0;
}