'commit'

TangDou/CSP-J/AcWingTraining/T4/1161.cpp

@@ -0,0 +1,12 @@
+#include <bits/stdc++.h>
+using namespace std;
+
+int main() {
+    string number;
+    cin >> number;
+    int res = 0;
+    for (int i = 0; i < number.size(); i++)
+        if (number[i] == '1') res++;
+    cout << res << endl;
+    return 0;
+}