leetcode258. Add Digits

    xiaoxiao2025-08-08  7

    class Solution { public: int addDigits(int num) { if(num == 0) return 0; int ans = 0; while(num > 0){ ans += num % 10; num /= 10; } ans = ans % 9; if(ans == 0) return 9; return ans; } };
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