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| author | crupest <crupest@outlook.com> | 2021-02-23 21:07:19 +0800 |
|---|---|---|
| committer | crupest <crupest@outlook.com> | 2021-02-23 21:07:19 +0800 |
| commit | d8f3b40085619cb680c8f227c65a1f5acc393223 (patch) | |
| tree | 6a38e3a6c79276fc396259ef962d17236dbed569 /leetcode/cpp/303.cpp | |
| parent | b0162802ad9723c678e495f29ca2f0fc0af2eff1 (diff) | |
| download | solutions-d8f3b40085619cb680c8f227c65a1f5acc393223.tar.gz solutions-d8f3b40085619cb680c8f227c65a1f5acc393223.tar.bz2 solutions-d8f3b40085619cb680c8f227c65a1f5acc393223.zip | |
Move leetcode solutions to subdir.
Diffstat (limited to 'leetcode/cpp/303.cpp')
| -rw-r--r-- | leetcode/cpp/303.cpp | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/leetcode/cpp/303.cpp b/leetcode/cpp/303.cpp new file mode 100644 index 0000000..06c4ad1 --- /dev/null +++ b/leetcode/cpp/303.cpp @@ -0,0 +1,26 @@ +#include <vector>
+
+using std::vector;
+
+class NumArray
+{
+private:
+ vector<int> prefix_sums;
+
+public:
+ NumArray(vector<int> &nums)
+ {
+ prefix_sums.push_back(0);
+ int sum = 0;
+ for (auto num : nums)
+ {
+ sum += num;
+ prefix_sums.push_back(sum);
+ }
+ }
+
+ int sumRange(int i, int j)
+ {
+ return prefix_sums[j + 1] - prefix_sums[i];
+ }
+};
|