import sys int1 = lambda x: int(x) - 1 # input = lambda: sys.stdin.buffer.readline() input = lambda: sys.stdin.readline().rstrip() ii = lambda: int(input()) i1 = lambda: int1(input()) mi = lambda: map(int, input().split()) mi1 = lambda: map(int1, input().split()) li = lambda: list(mi()) li1 = lambda: list(mi1()) lli = lambda n: [li() for _ in range(n)] INF = float("inf") mod = int(1e9 + 7) # mod = 998244353 class dsu: n = 1 parent_or_size = [-1 for i in range(n)] def __init__(self, N): self.n = N self.parent_or_size = [-1 for i in range(N)] def merge(self, a, b): assert 0 <= a < self.n, "0<=a