JungOl Question 1001 (http://jungol.co.kr/problem.php?id=1001)

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import java.util.*; public class Main { public static void main(String[] args) { // TODO Auto-generated method stub Scanner sc = new Scanner(System.in); for(;;){ //input, two numbers int total, totalLeg; total = sc.nextInt(); totalLeg = sc.nextInt(); //input 0 -> stop program if(total == 0 || totalLeg == 0){ break; } //input validation if(total > 1000 || total < 0 || totalLeg > 4000 || totalLeg < 0){ System.out.println("INPUT ERROR!"); }else{ Boolean findFlag = false; //Generate two numbers(dog and chick), sum of which are totalLeg(second input) for(int dog = 0;dog <= total;dog++){ int chick = total - dog; int computedLeg = dog * 4 + chick * 2; //if the number is found -> print "dog" and "leg" and break; if(totalLeg == computedLeg){ System.out.println(dog + " " + chick); findFlag = true; break; } } //No matching -> print "0" if(!findFlag){ System.out.println("0"); } } } } }