#include <bits/stdc++.h>
using namespace std;
ifstream fin("maxflow.in");
ofstream fout("maxflow.out");

struct str {
    int y, c;
    str(){y = -1;}
    str(int y, int c){
        this->y = y, this->c = c;
    }
};

queue<int> bfs;
vector<str> parent;
vector<vector<str>> lista;
int flow[1001][1001];

int bottleneck(int i){
    if(parent[i].y == 0) return 111000;
    return min(parent[i].c -  flow[parent[i].y][i], bottleneck(parent[i].y));
}

void update(int b, int i){
    if(parent[i].y == 0) return;

    flow[parent[i].y][i] += b;
    flow[i][parent[i].y] -= b;

    update(b, parent[i].y);
}

int main(){
    int n, m, x, y, z;
    fin>>n>>m;
    lista.resize(n+1);

    for(int i=1; i<=m; i++){
        fin>>x>>y>>z;
        lista[x].push_back({y, z});
        lista[y].push_back({x, 0});
    }

    parent.resize(n+1);
    int b;

    while(true){
        bfs.push(1);
        parent[1] = {0, 0};

        while(!bfs.empty()){
            x = bfs.front();
            bfs.pop();

            for(auto a: lista[x])
                if(parent[a.y].y == -1  && flow[x][a.y] < a.c) {
                    parent[a.y] = {x, a.c};
                    if(a.y == n) break;
                    bfs.push(a.y);

                }

        }

        if(parent[n].y != -1){
            b = bottleneck(n);
            update(b, n);
            fill(parent.begin(), parent.end(), str());

        }
        else break;
    }
    
    int F = 0;
    for(int i=1; i<=n; i++)
        F += flow[1][i];
    fout<<F;
}