20201123

20201123/main.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"math/big"
+	"strconv"
+)
+
+func main() {
+
+}
+
+func solution(k int, a []int) []int {
+	ks, _ := (&big.Int{}).SetString(strconv.Itoa(k), 0)
+	s := (&big.Int{}).Add(mergeSlice(a), ks).String()
+	return stringToSlice(s)
+}
+
+func mergeSlice(n []int) *big.Int {
+	var s string
+	for _, x := range n {
+		sn := strconv.Itoa(x)
+		s += sn
+	}
+	ret, _ := (&big.Int{}).SetString(s, 0)
+	return ret
+}
+
+func stringToSlice(s string) []int {
+	var ret []int
+	for _, sn := range s {
+		in, _ := strconv.Atoi(string(sn))
+		ret = append(ret, in)
+	}
+	return ret
+}

20201123/main_test.go

@@ -0,0 +1,109 @@
+package main
+
+import (
+	"reflect"
+	"testing"
+)
+
+//func Test_mergeSlice(t *testing.T) {
+//	type args struct {
+//		n []int
+//	}
+//	tests := []struct {
+//		name string
+//		args args
+//		want int
+//	}{
+//		{
+//			"example_1",
+//			args{[]int{1, 2, 0, 0}},
+//			1200,
+//		},
+//		{
+//			"example_2",
+//			args{[]int{2, 7, 4}},
+//			274,
+//		},
+//		{
+//			"example_3",
+//			args{[]int{2, 1, 5}},
+//			215,
+//		},
+//	}
+//	for _, tt := range tests {
+//		t.Run(tt.name, func(t *testing.T) {
+//			if got := mergeSlice(tt.args.n); got != tt.want {
+//				t.Errorf("mergeSlice() = %v, want %v", got, tt.want)
+//			}
+//		})
+//	}
+//}
+
+func Test_stringToSlice(t *testing.T) {
+	type args struct {
+		s string
+	}
+	tests := []struct {
+		name string
+		args args
+		want []int
+	}{
+		{
+			"example_1",
+			args{"1234"},
+			[]int{1, 2, 3, 4},
+		},
+		{
+			"example_2",
+			args{"455"},
+			[]int{4, 5, 5},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := stringToSlice(tt.args.s); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("stringToSlice() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func Test_solution(t *testing.T) {
+	type args struct {
+		k int
+		a []int
+	}
+	tests := []struct {
+		name string
+		args args
+		want []int
+	}{
+		{
+			"example_1",
+			args{34, []int{1, 2, 0, 0}},
+			[]int{1, 2, 3, 4},
+		},
+		{
+			"example_2",
+			args{181, []int{2, 7, 4}},
+			[]int{4, 5, 5},
+		},
+		{
+			"example_3",
+			args{806, []int{2, 1, 5}},
+			[]int{1, 0, 2, 1},
+		},
+		{
+			"example_4",
+			args{1, []int{9, 9, 9, 9, 9, 9, 9, 9, 9, 9}},
+			[]int{1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := solution(tt.args.k, tt.args.a); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("solution() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}