N, Q = map(int, input().split())
C = list(range(N))
for i in range(Q):
    query = list(map(int, input().split()))
    if query[0] == 1:
        print(C[query[1] - 1])
    elif query[0] == 2:
        _, x, c = query
        if C[x - 1] > c:
            C = [min(c+abs(x-1-i), C[i]) for i in range(N)]