{"id":34520,"date":"2024-11-01T09:28:56","date_gmt":"2024-11-01T09:28:56","guid":{"rendered":"http:\/\/atmokpo.com\/w\/?p=34520"},"modified":"2024-11-01T11:40:56","modified_gmt":"2024-11-01T11:40:56","slug":"javascript-coding-test-course-building-bridges","status":"publish","type":"post","link":"https:\/\/atmokpo.com\/w\/34520\/","title":{"rendered":"JavaScript Coding Test Course, Building Bridges"},"content":{"rendered":"

<\/p>\n

Problem Description<\/h2>\n

\n The bridge building problem is as follows. The given citizens want to build a bridge from ‘A’ to ‘B’.
\n This bridge will serve as a road connecting the two points ‘A’ and ‘B’ directly. Each citizen can choose several points to build the bridge,
\n and the distance between each point is predetermined. The problem is to find the length of the shortest bridge connecting the two points in the city.\n <\/p>\n

Problem Input<\/h2>\n

\n – The first line contains the number of points n<\/code> (1 \u2264 n<\/code> \u2264 1000).
\n – The second line contains an integer array positions<\/code> representing the location of each point.\n <\/p>\n

Problem Output<\/h2>\n

\n Output the minimum length required to build the bridge.\n <\/p>\n

Example Input<\/h2>\n
\n    5\n    1 2 4 5 10\n    <\/pre>\n
Example Output<\/h2>\n
\n    9\n    <\/pre>\n
Solution Process<\/h2>\n
\n        The first step to solving this problem is to sort the positions of the given points.
\n        The first point in the sorted list represents the location of ‘A’, and the last point represents the location of ‘B’.
\n        This way, it will be easy to calculate the total distance that needs to be traveled to build the bridge.\n    <\/p>\n
Step 1: Input and Sorting<\/h3>\n
\nfunction buildBridge(positions) {\n    \/\/ Sort the positions\n    positions.sort((a, b) => a - b);\n    return positions;\n}\n    <\/code><\/pre>\n
Step 2: Distance Calculation<\/h3>\n
\n        The next step is to calculate the distance between the first and the last point.
\n        This is the most important factor in determining the length of the bridge.\n    <\/p>\n
\nfunction calculateBridgeLength(positions) {\n    const firstPoint = positions[0];\n    const lastPoint = positions[positions.length - 1];\n    return lastPoint - firstPoint;\n}\n    <\/code><\/pre>\n
Step 3: Complete Function Implementation<\/h3>\n
\n        Now, finally, we will integrate the two implemented steps to complete the function that calculates the total length needed to build the bridge.\n    <\/p>\n
\nfunction buildBridge(positions) {\n    \/\/ Sort the positions\n    positions.sort((a, b) => a - b);\n    \n    \/\/ First and last points\n    const firstPoint = positions[0];\n    const lastPoint = positions[positions.length - 1];\n    \n    \/\/ Calculate bridge length\n    return lastPoint - firstPoint;\n}\n\n\/\/ Example usage\nconst inputPositions = [1, 2, 4, 5, 10];\nconst bridgeLength = buildBridge(inputPositions);\nconsole.log(bridgeLength);  \/\/ 9\n    <\/code><\/pre>\n
Conclusion<\/h2>\n
\n        Through this lecture, we practiced how to approach the given problem.
\n        By organizing basic arrays and calculating lengths, we were able to obtain the desired output from the provided input.
\n        This methodology is very useful for solving other algorithmic problems.
\n        Try out more challenging problems in the future!\n    <\/p>\n
Future Learning References<\/h2>\n