#include <iostream>
#include <string>
#include <map>
#include <algorithm>
 
int main(){
	std::string names_str[7] = {"Alex", "Louis", "Alex", "Simon", "Matthew", "Carl", "Simon"};
	int names[7];
 
	std::map<std::string, int> counter_map;
	int counter = 0;
 
	std::transform(std::begin(names_str), std::end(names_str), std::begin(names),
		[&](const std::string &name) {
			auto iter = counter_map.find(name);
			if (iter == counter_map.end())
				iter = counter_map.insert(std::make_pair(name, counter++)).first;
			return iter->second;
		}
	);
 
	for (int i = 0; i < 7; ++i)
		std::cout << names[i] << ' ';
	return 0;
}

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