#include <iostream>
 
int main (){
 
    int number = 0, nCounter = 0, sentinel = 101, i, j;
    int myArray[100];
 
    std::cout << "Please enter your numbers: " << std::endl;
 
    while ( (nCounter < 100) && (number != sentinel) ) {
        std::cin >> number;
        myArray[nCounter]= number;
        nCounter += 1;
    }
 
    for ( i = 0; i < nCounter; i++ ){
        if (myArray[i] > 0) {
            for( j = 0; j < nCounter; j++) {
                if(myArray[i] + myArray[j] == 0)
                    std::cout << myArray[i] << std::endl ;
            }
        }
    }
 
    return 0;
}

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