/**
 * Swaps two elements in an array.
 */
export declare function swap<T>(array: T[], i: number, j: number): void;
/**
 * Checks if two intervals are overlapping.
 *
 * Note: It returns false if the two intervals are just touching.
 *
 * @param lowA Lower bound of interval A.
 * @param highA Upper bound of interval A.
 * @param lowB Lower bound of interval B.
 * @param highB Upper bound of interval B.
 *
 * @returns True if the two intervals are overlapping, otherwise false.
 */
export declare function isOverlapping(lowA: number, highA: number, lowB: number, highB: number): boolean;