medium_21_4.java

public static int upperBound (int values[], int target) {     
	int left = 0;
	int right = values.length - 1;
	int mid;

	if (values[right] <= target) 
		return values.length; 

	while (right > left){
		mid = (left + right) / 2;
		if(values[mid] <= target)    
			left = mid + 1;
		else
			right = mid; 
	}
	return left;
}