// old

if(males > 0 && females > 0) {
			if(males > females) {
				couples = females;
			}
			else if(females > males) {
				couples = males;
			}
			else {
				couples = 1;
			}
			if(couples == 0)
				return;
...

// new
if(males > 0 && females > 0) {
			int couples = Math.min(males, females)
if(couples == 0)
				return;
...