import sys
readline=sys.stdin.readline

def Bisect_Int(ok,ng,is_ok):
    while abs(ok-ng)>1:
        mid=(ok+ng)//2
        if is_ok(mid):
            ok=mid
        else:
            ng=mid
    return ok
import numpy as np
N=int(readline())
K,L,D=[],[],[]
for _ in range(N):
    k,l,d=map(int,readline().split())
    K.append(k)
    L.append(l)
    D.append(d)
K=np.array(K,dtype=np.int64)
L=np.array(L,dtype=np.int64)
D=np.array(D,dtype=np.int64)
def is_ok(ans):
    cnt=0
    return np.sum(np.minimum(K,(ans-L>>D)+1)&1)&1
ans=Bisect_Int(1<<60,-1,is_ok)
print(ans)