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package hackerrank;

public class NumberLineJumps {

static String kangaroo(int x1, int v1, int x2, int v2) {

//sol1

//while문 사용

//각각 몇 번 누적합을 했는지 횟수를 세기위해 idx1, idx2변수를 두고 1씩 증가시켰다.

//x1이 x2보다 커지면 따라잡을 수 없으니 while문 종료

/*

int idx1 = 0;

int idx2 = 0;

while(x1 <= x2){

if(idx1 == idx2 && x1 == x2) return "YES";

x1 += v1;

idx1++;

x2 += v2;

idx2++;

}

return "NO";

*/

//sol2 : while 조건을 무한 반복

while (true) {

if (v1 <= v2) {

return "NO";

}

x1 += v1;

x2 += v2;

if (x1 == x2) return "YES";

if (x1 > x2) return "NO";

}

}

public static void main(String[] args) {

System.out.println(kangaroo(0, 3, 4, 2) + ", ans: YES");

System.out.println(kangaroo(0, 2, 5, 3) + ", ans: NO");

}

}