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-rw-r--r--other/3sum_closest.cpp31
1 files changed, 31 insertions, 0 deletions
diff --git a/other/3sum_closest.cpp b/other/3sum_closest.cpp
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+++ b/other/3sum_closest.cpp
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+#include "leetcode.h"
+
+class Solution {
+public:
+ int threeSumClosest(vector<int> &nums, int target) {
+ sort(nums.begin(), nums.end());
+ int n = nums.size(), ans = nums[0] + nums[1] + nums[2];
+ for (int i = 0; i < n - 2; ++i) {
+ int left = i + 1, right = n - 1;
+ while (left < right) {
+ int sum3 = nums[i] + nums[left] + nums[right];
+ if (abs(ans - target) > abs(sum3 - target))
+ ans = sum3;
+ if (sum3 == target)
+ break;
+ if (sum3 > target)
+ --right;
+ else
+ ++left;
+ }
+ }
+ return ans;
+ }
+};
+
+int main() {
+ Solution obj;
+ vector<int> nums = {-1, 2, 1, -4};
+ int target = 1;
+ cout << obj.threeSumClosest(nums, target);
+}