数圈圈：字符串、枚举

A.cpp

@@ -0,0 +1,15 @@
+using namespace std;
+
+#include<bits/stdc++.h>
+
+int main() {
+    int CC[] = {1, 0, 0, 0, 0, 0, 1, 0, 2, 1,};
+    string s;
+    while (cin >> s) {
+        int tot = 0;
+        for (size_t i = 0; i < s.length(); i++)
+            tot += CC[s[i] - '0'];
+        cout << tot << endl;
+    }
+    return 0;
+}