代码挑战: 最大子数组 | Go
【摘要】 Given an integer array nums, find the contiguous subarray (containing at least one number) which has the largest sum and return its sum.Example:Input: [-2,1,-3,4,-1,2,1,-5,4],Output: 6Explanation: ...
Given an integer array nums, find the contiguous subarray (containing at least one number) which has the largest sum and return its sum.
Example:
Input: [-2,1,-3,4,-1,2,1,-5,4],
Output: 6
Explanation: [4,-1,2,1] has the largest sum = 6.方案：
func maxSubArray(nums []int) int {
result := nums[0]
temp := nums[0]
for i := 1; i < len(nums); i++ {
temp = int(math.Max(float64(nums[i]), float64(nums[i]+temp)))
result = int(math.Max(float64(temp), float64(result)))
}
return result
}
测试案例：
func Test_maxSubArray(t *testing.T) {
type args struct {
nums []int
}
tests := []struct {
name string
args args
want int
}{
{"test1", args{nums: []int{-2, -3, 4, -1, -2, 1, 5, -3}}, 7},
{"test2", args{nums: []int{-2, 1, -3, 4, -1, 2, 1, -5, 4}}, 6},
{"test3", args{nums: []int{-2}}, -2},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if got := maxSubArray(tt.args.nums); got != tt.want {
t.Errorf("maxSubArray() = %v, want %v", got, tt.want)
}
})
}
}
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