#include <sstream>
#include <vector>
#include <iostream>
using namespace std;

vector<int> parseInts(string str) {
	//Complete this function
    stringstream ss(str);
    vector<int> vec ;
    int i ;
    char c ;

    while(!ss.eof())
    {
        ss >> i >> c ;
        vec.push_back(i) ; 
    }

    return vec ;
}

int main() {
    string str;
    cin >> str;
    vector<int> integers = parseInts(str);
    for(int i = 0; i < integers.size(); i++) {
        cout << integers[i] << "\n";
    }
    return 0;
}

In this challenge, we work with string streams.

stringstream is a stream class to operate on strings. It implements input/output operations on memory (string) based streams. stringstream can be helpful in different type of parsing. The following operators/functions are commonly used here

• Operator >> Extracts formatted data.
• Operator << Inserts formatted data.
• Method str() Gets the contents of underlying string device object.
• Method str(string) Sets the contents of underlying string device object.

Its header file is sstream.

One common use of this class is to parse comma-separated integers from a string (e.g., "23,4,56").

stringstream ss("23,4,56");
char ch;
int a, b, c;
ss >> a >> ch >> b >> ch >> c;  // a = 23, b = 4, c = 56

Here ch is a storage area for the discarded commas.
If the >> operator returns a value, that is a true value for a conditional. Failure to return a value is false.
Given a string of comma delimited integers, return a vector of integers.

Function Description
Complete the parseInts function in the editor below.
parseInts has the following parameters:
• string str: a string of comma separated integers

Returns
• vector: a vector of the parsed integers.
Note You can learn to push elements onto a vector by solving the first problem in the STL chapter.

Input Format
There is one line of n integers separated by commas.

Constraints
The length of str is less than 8⨯10⁵.

Sample Input
23,4,56

Sample Output
23
4
56