Killer.java

// problem: https://codeforces.com/problemset/problem/776/A

importjava.util.Scanner;

publicclassKiller{
publicstaticvoidmain(String[] args){
ScannersObj = newScanner(System.in);
String[] persons = newString[2];
String[] temp = newString[2];
inti = 0;
intx = 0;
for(Strings: sObj.nextLine().split(" ")){
persons[i] = s;
i++;
 }
intscenarios = Integer.parseInt(sObj.nextLine());
System.out.println(persons[0] + " " + persons[1]);
for(intj=0; j<scenarios; j++){
x=0;
for(Stringz: sObj.nextLine().split(" ")){
temp[x] = z;
x++;
 }
if(persons[0].equals(temp[0])){
persons[0] = temp[1];
 }
else{
persons[1] = temp[1];
 }
System.out.println(persons[0] + " " + persons[1]);
 }
 }
}