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2025-01-16 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Servers >
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Topic description: for an array, one number appears twice or once, while the other numbers appear three times. Find out the number. It actually corresponds to leetcode 137.
Most of the solutions on the Internet are bit operations.
Public int singleNumber (int [] nums) {int ans = 0; for (int I = 0; I
< 32; i++) { int sum = 0; for(int j = 0; j < nums.length; j++) { if(((nums[j] >> I) & 1) = 1) {sum++; sum% = 3;}} if (sum = = 1) {ans | = sum
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