'commit'

TangDou/LuoGuBook/P1980_1.cpp

@@ -0,0 +1,20 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+const int N = 10;
+int b[N];
+
+int main() {
+    int n, x;
+    scanf("%d %d", &n, &x);
+    for (int i = 1; i <= n; i++) {
+        int tmp = i, num;
+        while (tmp > 0) {
+            num = tmp % 10;
+            b[num]++;
+            tmp /= 10;
+        }
+    }
+    printf("%d", b[x]);
+    return 0;
+}