'commit'

TangDou/LanQiaoBei/LanQiaoBei13ShengSai_ZJ_II/1.cpp

@@ -0,0 +1,12 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+int n, cnt;
+int main() {
+    cin >> n;
+    for (int i = 3; i <= n; i++)
+        if (i % 10 == 3) cnt++;
+
+    cout << cnt << endl;
+    return 0;
+}