#include <iostream>
#include <algorithm>
int sum(std::initializer_list<int > intarray) {
return std::accumulate(std::begin(intarray), std::end(intarray), 0);
}
int main() {
std::cout << sum({1, 2, 3, 4, 5, 6, 7}) << std::endl;
return 0;
}
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