commit d09bb7de83559ce874eac4b1a049ccecdfe2c4a4
Author: Your Name <you@example.com>
Date:   Sat Oct 31 22:39:19 2026 +0800

    22:39

diff --git a/crystal/crystal.cpp b/crystal/crystal.cpp
new file mode 100644
index 0000000..7a0144f
--- /dev/null
+++ b/crystal/crystal.cpp
@@ -0,0 +1,16 @@
+#include<bits/stdc++.h>
+using namespace std;
+int n;
+long long m;
+int a[500005];
+int main() {
+    freopen("crystal.in", "r", stdin);
+    freopen("crystal.out", "w", stdout);
+    scanf("%d%lld", &n, &m);
+    for(int i = 1; i <= n; ++i) scanf("%d", &a[i]);
+    
+    return 0;
+}
+/*
+g++ crystal/crystal.cpp -o crystal/crystal -std=c++14 -O2 -static -Wall && cp crystal/crystal ~ && chmod +x ~/crystal && ~/crystal
+*/
\ No newline at end of file
diff --git a/migrate/migrate.cpp b/migrate/migrate.cpp
new file mode 100644
index 0000000..e69de29
diff --git a/subway/subway.cpp b/subway/subway.cpp
new file mode 100644
index 0000000..e69de29