View Code of Problem 50

#include<iostream>
#include<vector>
#include<algorithm>
#include<iomanip>
#include<string>
#include<cmath>

using namespace std;


int main()
{
	string str;
	getline(cin, str);

	string res;

	int flag = 0;
	for (int i = 0; i < str.size(); i++) {

		if (flag == 0 && !isdigit(str[i])) {

			res += "*";
			flag = 1;
		}

		if (isdigit(str[i])) {

			res += str[i];
			flag = 0;
		}
	}

	cout << res;
}