समस्या
Models need numbers, not words. One-hot encoding turns each category into a vector with one position per category: 1 at the category's position and 0 everywhere else.
Order the categories alphabetically. For each label, output its one-hot vector.
Implement one_hot(labels).
Input
labels: A list of category names.
Output
Return a matrix with one row per label and one column per distinct category (alphabetical order).
सीमाएँ
1 ≤ length ≤ 1,000
Each label is 1 to 20 characters
उदाहरण
उदाहरण 1
इनपुट:
labels = ["red", "green", "blue", "green"]
अपेक्षित आउटपुट:
expected = [
[0, 0, 1],
[0, 1, 0],
[1, 0, 0],
[0, 1, 0]
]इनपुट:
std::vector<std::string> labels = {"red", "green", "blue", "green"};
अपेक्षित आउटपुट:
std::vector<std::vector<long long>> expected = {
{0, 0, 1},
{0, 1, 0},
{1, 0, 0},
{0, 1, 0}
};इनपुट:
string[] labels = new string[] {"red", "green", "blue", "green"};
अपेक्षित आउटपुट:
long[][] expected = new long[][] {
new long[] {0, 0, 1},
new long[] {0, 1, 0},
new long[] {1, 0, 0},
new long[] {0, 1, 0}
};व्याख्या
The categories in alphabetical order are blue, green, red. So red → [0, 0, 1], green → [0, 1, 0] and blue → [1, 0, 0].
उदाहरण 2
इनपुट:
labels = ["yes"]
अपेक्षित आउटपुट:
expected = [
[1]
]इनपुट:
std::vector<std::string> labels = {"yes"};
अपेक्षित आउटपुट:
std::vector<std::vector<long long>> expected = {
{1}
};इनपुट:
string[] labels = new string[] {"yes"};
अपेक्षित आउटपुट:
long[][] expected = new long[][] {
new long[] {1}
};व्याख्या
There is only one category, so every vector is [1].
संदर्भ
यह चुनौती CodeUtility के लिए अनुकूलित की गई है। ऊपर दिए गए स्टेटमेंट और सीमाओं का पालन करें।