import java.util.Scanner;

public class Main2 {
	public static void main(String[] args) {
		Main2 p = new Main2();
	}

	public Main2() {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		score = new int[n][n];
		for(int i=0;i<m;i++)
			score[sc.nextInt()][sc.nextInt()] =sc.nextInt();
		solve(score);
	}

	private int[][] score;
	private int isUsed;
	private int[] a;
	public void solve(int[][] score) {
		isUsed = 0;
		a = new int[score.length];
		int res = rec(0);
		System.out.println(res);
	}

	private int rec(int cur) {
		if(cur==score.length)
			return calc();
		
		int res=0;
		for(int i=0;i<score.length;i++){
			if((isUsed & (1<<i))!=0)
				continue;
			
			isUsed += (1<<i);
			a[cur] = i;
			res = Math.max(res, rec(cur+1));
			isUsed -= (1<<i);
		}
			
		return res;
	}
	
	private int calc(){
		int res = 0;
		for(int i=0;i<score.length;i++){
			for(int j=i+1;j<score[i].length;j++){
				res += score[a[i]][a[j]];
			}
		}
		return res;
	}

}