without using the sstream
#include<iostream>
#include<string>
#include<vector>

using namespace std;

vector<int> pras(string str){
    vector<int> point;
    vector<int> point2;
    point.push_back(0);
    for(int i=0;i<str.length();i++){
        if(str.find(",",i)+1 == 0){
            break;
        }
        point.push_back(str.find(",",i)+1);
    }

    for(int i =0;i<point.size()-1;i++){
        if(point[i] != point[i+1]){
            point2.push_back(point[i]);
        }
    }
    point2.push_back(point[point.size()-1]);

    for(int i =0;i<point2.size()-1;i++){
        point[i] = stoi(str.substr(point2[i],point2[i+1]-point2[i]-1));
    }
    point[point2.size()-1] = stoi(str.substr(point2[point2.size()-1]));

    point.resize(point2.size());

    return point;
}

int main(){
    string str;
    cin>>str;
    vector<int> data = pras(str);
    for(int i =0; i<data.size();i++){
        cout<<data[i]<<endl;
    }

    return 0;
}

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

vector<int> parseInts(string str) {
    stringstream mystring(str);
    vector<int> ints;
    char ch;
    int num;
    while (mystring >> num) {
        ints.push_back(num);
        mystring >> ch;
    }
    return ints;
}

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;
}

vector<int> parseInts(string str) {
    
    vector<int> arr;
    string t;
    stringstream ss(str);
    char del = ',';
    
    while (getline(ss, t, del)){
        int num = atoi(t.c_str());
        arr.push_back(num);
    }
    return arr;
}