#include <iostream>
#include <vector>
#include <iomanip>
#include <string>
#include <algorithm>
#include <cmath>
#include <stdexcept>
#include <type_traits>
#include <cctype>
#include <list>
#include <deque>
#include <stack>
#include <functional>
using namespace std;

//primjer 3, zadatak 4


string Fun(string s, int n){
    string novi;
    int brojac=0;
    for (int i=0;i<s.length();){
        while(i!=s.length() && s[i]==' ') i++;
        if (i==s.length()) return novi;
        brojac++;
        if (brojac==n){
            int broj=i;
            while (i!=s.length() && s[i]!=' ') i++;
            novi.resize(i-broj);
            int josnekibroj=broj;
            for (int j=0;j<i-josnekibroj;j++) novi[j]=s[broj++];
            return novi;
        }
        while (i!=s.length() && s[i]!=' ') i++;
    }
    return novi;
}

int main()
{
    string s="Ja sam neki string koji sluzi za primjer";
    string c=Fun(s, 3);
    cout<<c;
    return 0;
}