N, M = map(int, input().split())

item = [list(map(int, input().split())) for i in range(M)]

from itertools import product

ans = 0

from collections import deque

for i in product(range(2), repeat=M):
    
    X = [[] for i in range(N)]
    
    Y = 0
    
    for j in range(M):
        
        if i[j]:
            
            item1, item2, score = item[j]
            
            X[item1] += [item2]
            
            Y += score
            
    
    for j in range(N):
        
        visited = [0] * N
        
        visited[j] = 1
        
        que = deque([j])
        
        while que and Y:
            
            
            q = que.popleft()
            
            for x in X[q]:
                
                if x == j:
                    
                    Y = 0
                    break
                
                if visited[x] == 0:
                    
                    visited[x] = 1
                    
                    que.append(x)
        
        
        if Y == 0:
            break
    
    
    ans = max(ans, Y)
    
print(ans)