#include <iostream>
#include <iterator>
#include <algorithm>
#include <string>
int main() {
std::string str("this is test string");
std::string::const_iterator const r = std::remove(str.begin(), str.end(), ' ');
std::copy(str.cbegin(), r, std::ostream_iterator<char>(std::cout));
std::cout << std::endl;
}
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