feat: dp 01 day

Author: 陈世伟

leetcode/509.斐波那契数/fib.go

@@ -0,0 +1,13 @@
+package _09_斐波那契数
+
+func fib(n int) int {
+	var dp = make([]int, n+1)
+	dp[0] = 0
+	dp[1] = 1
+
+	for i := 2; i <= n; i++ {
+		dp[i] = dp[i-1] + dp[i-2]
+	}
+
+	return dp[n]
+}

leetcode/509.斐波那契数/fib_test.go

@@ -0,0 +1,23 @@
+package _09_斐波那契数
+
+import "testing"
+
+func Test_fib(t *testing.T) {
+	type args struct {
+		n int
+	}
+	tests := []struct {
+		name string
+		args args
+		want int
+	}{
+		{name: ``, args: args{n: 4}, want: 3},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := fib(tt.args.n); got != tt.want {
+				t.Errorf("fib() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}