diff --git a/S2OJ/1497/1497.cpp b/S2OJ/1497/1497.cpp
new file mode 100644
index 00000000..061e8fc0
--- /dev/null
+++ b/S2OJ/1497/1497.cpp
@@ -0,0 +1,71 @@
+#include <iostream>
+#include <chrono>
+#include <map>
+#include <random>
+#include <set>
+#include <vector>
+
+using std::cin;
+using std::cout;
+const char endl = '\n';
+
+const int N = 1e6 + 5;
+
+int n, m, a, b, ans;
+unsigned long long sum[N];
+std::vector<std::pair<int, unsigned long long>> g[N];
+std::map<int, unsigned long long> map;
+std::set<unsigned long long> set;
+
+void dfs(int u, int f, unsigned long long s) {
+    sum[u] = sum[f] ^ s;
+
+    for (auto e : g[u]) {
+        int v = e.first;
+        unsigned long long w = e.second;
+
+        if (v == f) continue;
+
+        dfs(v, u, w);
+    }
+}
+
+signed main() {
+    std::ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+
+    std::mt19937_64 rand(std::chrono::system_clock::now().time_since_epoch().count());
+
+    cin >> n >> m;
+
+    for (int i = 1; i < n; i++) {
+        int u, v, w;
+
+        cin >> u >> v >> w;
+
+        if (!map.count(w)) map[w] = rand();
+        set.insert(map[w]);
+        g[u].emplace_back(v, map[w]);
+        g[v].emplace_back(u, map[w]);
+    }
+
+    dfs(1, 0, 0);
+
+    cin >> a >> b;
+
+    while (m--) {
+        int x = a % n + 1,
+            y = b % n + 1;
+
+        unsigned long long s = sum[x] ^ sum[y];
+
+        if (s == 0 || set.count(s)) ans++;
+
+        a = static_cast<long long>(a) * 666073 % 1000000007;
+        b = static_cast<long long>(b) * 233 % 998244353;
+    }
+
+    cout << ans << endl;
+
+    return 0;
+}
diff --git a/S2OJ/1497/data/data1.in b/S2OJ/1497/data/data1.in
new file mode 100644
index 00000000..280c2fd1
--- /dev/null
+++ b/S2OJ/1497/data/data1.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:fb749812f6a88e1ba467ae9e64d8fd8b39e31cdd9a50974a1f9def80e0ded2f9
+size 25629
diff --git a/S2OJ/1497/data/data1.out b/S2OJ/1497/data/data1.out
new file mode 100644
index 00000000..ca267b30
--- /dev/null
+++ b/S2OJ/1497/data/data1.out
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1121cfccd5913f0a63fec40a6ffd44ea64f9dc135c66634ba001d10bcf4302a2
+size 2
diff --git a/S2OJ/1497/data/data2.in b/S2OJ/1497/data/data2.in
new file mode 100644
index 00000000..47dba762
--- /dev/null
+++ b/S2OJ/1497/data/data2.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:98ed7f715de793f650222086e4b61609eeb63ec869e9f38b4d62691f09acdf89
+size 1388724
diff --git a/S2OJ/1497/data/data2.out b/S2OJ/1497/data/data2.out
new file mode 100644
index 00000000..bb31471a
--- /dev/null
+++ b/S2OJ/1497/data/data2.out
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:2a62cf402cd3396aa00f55f892f4545f308f74d01c8caa0f2837b1982f821595
+size 3
diff --git a/S2OJ/1497/data/data3.in b/S2OJ/1497/data/data3.in
new file mode 100644
index 00000000..06b6cd70
--- /dev/null
+++ b/S2OJ/1497/data/data3.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:396add9bbe2f72661278be6a5c5fbadfc6f159be2845330f6939b285904cc9d9
+size 1385902
diff --git a/S2OJ/1497/data/data3.out b/S2OJ/1497/data/data3.out
new file mode 100644
index 00000000..b48632ca
--- /dev/null
+++ b/S2OJ/1497/data/data3.out
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:bd5fa6e75f0ddfcd9ff32e0a2297554cd81188f177f14d7ce416310efa0b5c77
+size 3
diff --git a/S2OJ/1497/data/data4.in b/S2OJ/1497/data/data4.in
new file mode 100644
index 00000000..46d0a4dc
--- /dev/null
+++ b/S2OJ/1497/data/data4.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:6e2b0dba48245f6370356cf87cfa3af48389b0101df57d8f87274f4ca3c46627
+size 15766349
diff --git a/S2OJ/1497/data/data4.out b/S2OJ/1497/data/data4.out
new file mode 100644
index 00000000..b48632ca
--- /dev/null
+++ b/S2OJ/1497/data/data4.out
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:bd5fa6e75f0ddfcd9ff32e0a2297554cd81188f177f14d7ce416310efa0b5c77
+size 3
diff --git a/S2OJ/1497/data/data5.in b/S2OJ/1497/data/data5.in
new file mode 100644
index 00000000..931206de
--- /dev/null
+++ b/S2OJ/1497/data/data5.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0d00eeb21053c234f342c0782a77d9e2b1dc48d0457a8873f869e9f106acbca0
+size 15892206
diff --git a/S2OJ/1497/data/data5.out b/S2OJ/1497/data/data5.out
new file mode 100644
index 00000000..38c32322
--- /dev/null
+++ b/S2OJ/1497/data/data5.out
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:be4ba010e48e7d5c7c60457e7f40538407a26f4ead94b392beff67a3a5546b8a
+size 3
diff --git a/S2OJ/1497/data/data6.in b/S2OJ/1497/data/data6.in
new file mode 100644
index 00000000..9b54233d
--- /dev/null
+++ b/S2OJ/1497/data/data6.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4197d02b0b905f2628750cecf31afff6f86be6660f40f67809a3d410644a0b0e
+size 15745972
diff --git a/S2OJ/1497/data/data6.out b/S2OJ/1497/data/data6.out
new file mode 100644
index 00000000..da11d17b
--- /dev/null
+++ b/S2OJ/1497/data/data6.out
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1e313ad220a460ae9fb1fa62d4c7dc46759398470ac2eba5d56acfd7565d07a2
+size 8
diff --git a/S2OJ/1497/data/problem.conf b/S2OJ/1497/data/problem.conf
new file mode 100644
index 00000000..b13f5ce7
--- /dev/null
+++ b/S2OJ/1497/data/problem.conf
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:9b62fe8129a873b9c17f5e5de75ba6b9a94a79dd9fa62c9b02681d43d00ef359
+size 176