#include <cstdio>
#include <cstring>
#include <stack>
#include <vector>

using namespace std;

inline int next_int() {
	int d;
	scanf("%d", &d);
	return d;
}

const int V = 1 << 10;
const int E = 1 << 14;

int ec, eb[V], en[E], et[E];

int n, m;
int cap[V][V], Q[V], seen[V], from[V];

int bfs(int s, int d) {
	memset(seen, 0, sizeof seen);
	memset(from, -1, sizeof from);
	int front = 0, back = 0;
	Q[back++] = s;
	seen[s] = true;
	while (back - front > 0) {
		int u = Q[front++];
		for (int e = eb[u]; e != -1; e = en[e]) {
			int v = et[e];
			if (seen[v] == false && cap[u][v] > 0) {
				Q[back++] = v;
				seen[v] = true;
				from[v] = u;
			}
		}
	}
	int flow = 1 << 30, where = d;
	while (from[where] != -1) {
		flow = min(flow, cap[from[where]][where]);
		where = from[where];
	}
	where = d;
	while (from[where] != -1) {
		cap[from[where]][where] -= flow;
		cap[where][from[where]] += flow;
		where = from[where];
	}
	return flow == 1 << 30 ? 0 : flow;
}

int main() {
	freopen("maxflow.in", "r", stdin);
	freopen("maxflow.out", "w", stdout);
	memset(eb, -1, sizeof eb);
	n = next_int();
	m = next_int();
	for (int i = 0; i < m; i++) {
		int u = next_int();
		int v = next_int();
		et[ec] = v;
		en[ec] = eb[u];
		eb[u] = ec++;
		et[ec] = u;
		en[ec] = eb[v];
		eb[v] = ec++;
		cap[u][v] += next_int();
	}
	int flow = 0;
	while (int f = bfs(1, n)) {
		flow += f;
	}
	printf("%d\n", flow);
	return 0;
}