import sys
input=lambda:sys.stdin.readline().rstrip()
def find(par,i):
    if par[i]==-1:
        return i
    root=find(par,par[i])
    par[i]=root
    return root
def unite(par,i,j):
    par[find(par,i)]=find(par,j)
N=int(input())
par=[-1 for i in range(N)]
ans=0
for i in range(N*(N-1)//2):
    a,b,C=map(int,input().split())
    if find(par,a-1)!=find(par,b-1):
        unite(par,a-1,b-1)
        ans=max(ans,C)
print(ans)