'commit'

TangDou/LanQiaoBei/LanQiao12XuanBaSaiZhongJi/3_2.cpp

@@ -0,0 +1,25 @@
+
+#include <iostream>
+
+using namespace std;
+
+// 123
+bool dzs(int x) {
+    int p = 10;
+    while (x) {
+        if (x % 10 > p) return false;
+        p = x % 10;
+        x /= 10;
+    }
+    return true;
+}
+int n, cnt;
+
+int main() {
+    cin >> n;
+    for (int i = 11; i <= n; i++)
+        if (dzs(i)) cnt++;
+
+    printf("%d\n", cnt);
+    return 0;
+}