108 lines
2.8 KiB
C#
108 lines
2.8 KiB
C#
using System.Reflection.Metadata.Ecma335;
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namespace Lab3
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{
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internal class Program
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{
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public static long methodToAnalysis1(int[] arr)
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{
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long n = arr.Length;
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long k = n;
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for (int i = 0; i < n; i++)
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{
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if (arr[i] / 7 == 0)
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{
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k -= 2;
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}
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else
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{
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k += 3;
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}
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}
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if (arr[0] > 0)
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{
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for (int i = 0; i < n * n; i++)
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{
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if (arr[0] > 0)
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{
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k += 3;
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}
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}
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}
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return k;
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}
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public static long methodToAnalysis2(int n, int[] arr)
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{
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long k = 0;
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for (int i = 0; i < n; i++)
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{
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k += arr[i] + FF4(i, arr);
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}
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return k;
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}
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public static long FF4(int n, int[] arr)
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{
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if (n > 0 && arr.Length > n && arr[n] < 0)
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{
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return FF4(n / 2, arr) + FF4(n / 3, arr);
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}
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return n;
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}
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public static int knapsack(int weightLimit, int n, int[] weights, int[] values)
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{
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if (n == 1)
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{
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return weights[0] <= weightLimit ? values[0] : 0;
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}
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if (weights[n - 1] > weightLimit)
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{
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return knapsack(weightLimit, n - 1, weights, values);
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}
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int case1 = knapsack(weightLimit - weights[n - 1], n - 1, weights, values) + values[n - 1];
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int case2 = knapsack(weightLimit, n - 1, weights, values);
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return Math.Max(case1, case2);
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}
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public static int knapsackDP(int weightLimit, int n, int[] weights, int[] values)
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{
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int[,] memo = new int[n + 1, weightLimit +1];
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for (int i = 1; i <= n; i++)
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{
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for (int w = 1; w <= weightLimit; w++)
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{
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if (weights[i-1] <= w)
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{
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memo[i, w] = Math.Max(values[i - 1] + memo[i - 1, w - weights[i - 1]], memo[i - 1, w]);
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}
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else
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{
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memo[i, w] = memo[i - 1, w];
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}
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}
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}
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return memo[n, weightLimit];
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}
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static void Main(string[] args)
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{
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int weightLimit = 15;
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int[] weights = new int[]{ 7, 2, 1, 9 };
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int[] values = new int[]{ 5, 4, 7, 2 };
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int n = weights.Length;
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Console.WriteLine(knapsackDP(weightLimit, n, weights, values));
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Console.WriteLine(knapsack(weightLimit, n, weights, values));
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}
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}
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} |