1 files changed, 27 insertions, 0 deletions
diff --git a/store/works/life/chuanzhi-cup/practice-contest/1.cpp b/store/works/life/chuanzhi-cup/practice-contest/1.cpp
new file mode 100644
index 0000000..1a0d88e
--- /dev/null
+++ b/store/works/life/chuanzhi-cup/practice-contest/1.cpp
@@ -0,0 +1,27 @@
+#include <iostream>
+
+int main() {
+  int n;
+  std::cin >> n;
+
+  int count = 0;
+
+  for (int i = 1; i <= n; i++) {
+    int num = i;
+    int sum = 0;
+    while (num != 0) {
+      sum += num % 10;
+      num /= 10;
+
+      if (sum > 9)
+        break;
+    }
+
+    if (sum == 9)
+      count++;
+  }
+
+  std::cout << count;
+
+  return 0;
+}