#include <iostream>
 
std::istream& f(std::istream &in) {
    std::string temp = "";
    while(true) { 
        while (in >> temp) {
            if (temp == "-1") {
                break;
            }
            std::cout << temp << std::endl;
        }
        if (in.eof()|| temp == "-1") break;
        if (!in) {
            std::cout << "Invalid input"  << std::endl;
            in.clear();
            in.ignore(10000,32);
        }
    }
    in.seekg(0, std::ios::beg);
    return in;
}
 
int main(){
    std::cout << "Please input some integers and end with ^Z or -1" << std::endl;
    f(std::cin);
    return 0;
}

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MTMxMTIxMzIxMzgxMjEzMjE1MTUxODEKNTI0MTUzMTMKMS4yMzI4NjMKLTE2ODEzNS4xNTEKLTE=

13112132138121321515181
52415313
1.232863
-168135.151
-1