SapiWb - Online C Compiler & Debugging Tool

#include <stdio.h>

int main(void) {
	int t;
	scanf("%d", &t);
	for (int i = 0; i < t; i++) {
		int x, y;
		scanf("%d%d", &x, &y);
		int first = x, second = x;
		while (x != 1 && x < y) {
			if (x % 2 == 0)
				x /= 2;
			else if (x % 2 == 1)
				x = 3 * x + 1;
			if (x > first) {
				second = first;
				first = x;
			} else if ((x < first && x > second) || (x < first && first == second))
				second = x;
			//printf("x = %d, first = %d, second = %d\n", x, first, second);
		}
		//printf("\n");
		printf("%d\n", second);
	}
	return 0;
}