/**
 * Permutes an array arr.length! times or perms times.
 * @param arr The array to permute.
 * @param perms The maximum number of times to permute.
 * @returns An array with perms permutations of arr.
 */
export declare function permute<T>(arr: T[], perms: number): T[][];
/**
 * Permutes an array arr.length! times or perms times. This algorithm tries
 * to permute the array given randomly in order to get more diversity on NP
 * problem solutions.
 * @param arr The array to permute.
 * @param perms The maximum number of times to permute.
 * @returns An array with perms permutations of arr.
 */
export declare function randPermute<T>(arr: T[], perms?: number): T[][];
/**
 * Generates a random permutation with numbers from 0 to n - 1.
 * @param n The size of the array.
 */
export declare function randPermutation(n: number): number[];