1.用一个boolean数组prime,N/2大小,用来表示3,5,7,9,11,13,15,17,19...等的奇数(因为偶数不可能成为素数,2除外) 均置为prime[i] = true 2.然后进行判断, i = 0时,由于prime[0]=true(3); 则将数组内 i + (2 * i + 3) * j < sqrt(N) 的数置为false(为合数), prime[3] = (9) ...
和第二种解法的思路类似,将20个数变成布尔类型的数组,计算出二进制数中1的个数当做数组的下标去匹配。 publicintcountPrimeSetBits3(intL,intR){intcount=0;boolean[] arr = {false,false,true,true,false,true,false,true,false,false,false,true,false,true,false,false,false,true,false,true};for(inti=L...
Can you solve this real interview question? Prime Number of Set Bits in Binary Representation - Given two integers left and right, return the count of numbers in the inclusive range [left, right] having a prime number of set bits in their binary represen
「leetcode系列」第一期 二进制表示中质数个计算置位 762. Prime Number of Set Bits in Binary Representation Given two integers L and R, find the count of numbers in the range [L, R] (inclusive) having a prime number of set bits in their binary representation.(Recall that the number of se...
Given two integers L and R, find the count of numbers in the range [L, R] (inclusive) having a prime number of set bits in their binary representation. (Recall that the number of set bits an integer has is the number of 1s present when written in binary. For example, 21 written in...
{ int prime = PRIMES[j]; if (x % (prime * prime) == 0) { check = false; break; } if (x % prime == 0) { subset |= (1 << j); } } if (!check) { continue; } // 动态规划 for (int mask = (1 << PRIMES.length) - 1; mask > 0; --mask) { if ((mask & ...
来源：力扣（LeetCode） 链接：https://leetcode-cn.com/problems/perfect-number/ 著作权归领扣网络所有。商业转载请联系官方授权，非商业转载请注明出处。解法一：解法一添加一个获取num所有正因子（除了它本身）的方法calculateAllPrimeFactor，返回值是一个List，将返回值所有的元素相加，判断是否等于num，如果...
int numPrimeArrangements(int n){ int isPrinum=0; int i; for(i=1;i<=n;i++){ if(check(i)){ isPrinum++; } } int isnPrinum=n-isPrinum; return (pailie(isPrinum)*pailie(isnPrinum))%(1000000007); } 1. 2. 3. 4.
* @param {number} n * @return {number} */ var numPrimeArrangements = function(n) { const mod = 1000000007n; // 先把100以内的质数打表(不想再写判断质数的代码了 const prime = [2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97]; ...
90 perfect-number 📗 Easy LeetCode Math 91 prime-number-of-set-bits-in-binary-representation 📗 Easy LeetCode Bit 92 number-complement 📗 Easy LeetCode Bit 93 move-zeroes 📗 Easy LeetCode Array 94 relative-ranks 📗 Easy LeetCode 95 valid-perfect-square 📗 Easy LeetCode Math 96...