https://leetcode.com/problems/integer-break/description/
int integerBreak(int n) {
if(n == 2)
return 1;
else if(n == 3)
return 2;
else if(n%3 == 0)
return (int) pow(3, n/3);
else if(n%3 == 1)
return 2 * 2 * (int) pow(3, (n - 4) / 3);
else
return 2 * (int) pow(3, n/3);
}
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