#include <iostream>
#include <string>
using namespace std;
void
foo(string &str1, const size_t pos, const string &str2)
{
str1.insert(pos, str2);
}
int
main()
{
string str1;
string str2;
int ch;
cout << "Stroka1" << endl;
getline(cin, str1);
cout << "Stroka2" <<endl;
getline(cin, str2);
cout << "Nomer simvola" <<endl;
cin >> ch;
foo(str1, ch, str2);
cout << str1;
}
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