Submission #1857223

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Source Code Expand

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <map>
#include <stack>
#include <cmath>
#include <queue>
#include <numeric>


int main()
{
	std::string s;

	std::cin >> s;

	std::cout << std::count(s.begin(), s.end(), '1') << std::endl;

	return 0;
}

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