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Create 0918-Maximum-Sum-Circular-Subarray.cpp #2357

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Create 0918-Maximum-Sum-Circular-Subarray.cpp #2357

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20 changes: 20 additions & 0 deletions cpp/0918-Maximum-Sum-Circular-Subarray.cpp
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Original file line number Diff line number Diff line change
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class Solution {
public:
int maxSubarraySumCircular(vector<int>& nums) {
if (nums.size() == 1) { return nums[0]; }
int total = 0;
int curr_min = 0;
int curr_max = 0;
int glob_min = nums[0];
int glob_max = nums[0];

for (const auto& n : nums) {
curr_min = min(curr_min + n, n);
curr_max = max(curr_max + n, n);
total += n;
glob_min = min(glob_min, curr_min);
glob_max = max(glob_max, curr_max);
}
return (glob_max > 0) ? (max(glob_max, (total - glob_min))) : glob_max;
}
};