LeetCode 628. Maximum Product of Three Numbers

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class Solution {
public:
int maximumProduct(vector<int>& nums) {
int min1 = INT_MAX, min2 = INT_MAX;
int max1 = INT_MIN, max2 = INT_MIN, max3 = INT_MIN;
for (const int num : nums) {
if (num < min1) {
min2 = min1;
min1 = num;
} else if (num < min2) {
min2 = num;
}
if (num > max1) {
max3 = max2;
max2 = max1;
max1 = num;
} else if (num > max2) {
max3 = max2;
max2 = num;
} else if (num > max3) {
max3 = num;
}
}
return max(min1 * min2 * max1, max1 * max2 * max3);
}
};