'commit'

TangDou/CSP-J/J2_2019/1.cpp

@@ -0,0 +1,12 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+int cnt;
+int main() {
+    string s;
+    cin >> s;
+    for (int i = 0; i < s.size(); i++)
+        if (s[i] == '1') cnt++;
+    printf("%d\n", cnt);
+    return 0;
+}