diff --git a/31xxx/31628.cpp b/31xxx/31628.cpp
new file mode 100644
index 00000000..019e8b52
--- /dev/null
+++ b/31xxx/31628.cpp
@@ -0,0 +1,27 @@
+#include <iostream>
+#include <string>
+#include <vector>
+using namespace std;
+
+bool solve(void) {
+  vector<vector<string>> v(10, vector<string>(10));
+  for (int i=0; i<10; i++) for (int j=0; j<10; j++) cin >> v[i][j];
+  
+  for (int i=0; i<10; i++) {
+    bool flag = true;
+    for (int j=1; j<10; j++) if (v[i][j] != v[i][j-1]) flag = false;
+    if (flag) return true;
+    flag = true;
+    for (int j=1; j<10; j++) if (v[j][i] != v[j-1][i]) flag = false;
+    if (flag) return true;
+  }
+  return false;
+}
+
+int main(void) {
+  ios::sync_with_stdio(false);
+  cin.tie(nullptr);
+
+  cout << solve();
+  return 0;
+}
\ No newline at end of file