https://leetcode.com/problems/number-of-islands/description/?envType=problem-list-v2&envId=mz5jjong 島を1つ見つけると全部消して1つカウントをインクリメントする戦略。 func numIslands(grid [][]byte) int { visitedPoint := make(map[[2]int]struc…

Subarray Sum Equals K - LeetCode func subarraySum(nums []int, k int) int { pairCount := 0 for startIndex, _ := range nums { sum := 0 for _, value := range nums[startIndex:] { sum += value if sum == k { pairCount += 1 } } } return pairCount…