'commit'

TangDou/LanQiaoBei/LanQiao14STEMA202302/2.cpp

@@ -0,0 +1,21 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+int n, m;
+int cnt;
+bool check(int x) {
+    while (x) {
+        int r = x % 10;
+        if (r % 2 == 0) return false;
+        x /= 10;
+    }
+    return true;
+}
+int main() {
+    cin >> n >> m;
+    for (int i = n; i <= m; i++)
+        if (check(i)) cnt++;
+
+    printf("%d\n", cnt);
+    return 0;
+}