#include <iostream>
#include <sstream>
#include <vector>
#include <algorithm>
 
int main() {
   int v;
   std::vector<int> values;
 
   // Create a istringstream using a hard coded string.
   std::string data = "10 15 20";
   std::istringstream str(data);
 
   // Use the rdbuf of the istringstream as the rdbuf of std::cin.
   auto old = std::cin.rdbuf(str.rdbuf());
 
   while(std::cin >> v) {
      values.emplace_back(v);
   }
   std::cout << "The Sum is " << std::accumulate(values.begin(), values.end(), 0) << std::endl;
 
   // Restore the rdbuf of std::cin.
   std::cin.rdbuf(old);
 
   return 0;
}
 

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