class UnionFind():
    def __init__(self, n):
        self.n = n
        self.parents = [-1] * n
        self.hasloop = [False] * n
        self.group = n

    def find(self, x):
        if self.parents[x] < 0:
            return x
        else:
            self.parents[x] = self.find(self.parents[x])
            return self.parents[x]

    def union(self, x, y):
        x = self.find(x)
        y = self.find(y)

        if x == y:
            self.hasloop[x] = True
            return
        self.group -= 1
        if self.parents[x] > self.parents[y]:
            x, y = y, x
        self.hasloop[x] |= self.hasloop[y]
        self.parents[x] += self.parents[y]
        self.parents[y] = x

    def size(self, x):
        return -self.parents[self.find(x)]

    def same(self, x, y):
        return self.find(x) == self.find(y)

    def members(self, x):
        root = self.find(x)
        return [i for i in range(self.n) if self.find(i) == root]

    def roots(self):
        return [i for i, x in enumerate(self.parents) if x < 0]

    def group_count(self):
        return self.group

    def all_group_members(self):
        dic = {r:[] for r in self.roots()}
        for i in range(self.n):
            dic[self.find(i)].append(i)
        return dic

    def __str__(self):
        return '\n'.join('{}: {}'.format(r, self.members(r)) for r in self.roots())
        
n = int(input())
ab = []
UF = UnionFind(n)
edges = [[] for _ in range(n)]
ans = [-1] * n
used = [False] * n
stack = []
for i in range(n):
    a, b = map(int, input().split())
    a -= 1
    b -= 1
    if UF.same(a, b):
        ans[i] = a + 1
        stack.append(a)
        used[i] = True
    else:
        edges[a].append((b, i))
        edges[b].append((a, i))
    
    UF.union(a, b)
    
for r in UF.roots():
    if not UF.hasloop[r]:
        print("No")
        exit()

print("Yes")

while stack:
    pos = stack.pop()
    for npos, i in edges[pos]:
        if used[i]:
            continue
        used[i] = True
        ans[i] = npos + 1
        stack.append(npos)

print(*ans, sep="\n")