added double jump and sitting state

term1/seminar05_iterators/03_is_uppper/main.cpp

@@ -0,0 +1,18 @@
+#include <algorithm>
+#include <iostream>
+#include <algorithm>
+#include <string>
+#include <numeric>
+#include <cctype>
+
+using std::string, std::cin, std::cout, std::endl;
+
+bool strIsUpper(const string& s) {
+    return std::accumulate(s.begin(), s.end(), true, [](bool res, char c) {return res && (!isalpha(c) || isupper(c)); });
+}
+
+int main() {
+    string s;
+    getline(cin, s);
+    cout << strIsUpper(s) << endl;
+}