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Copy pathKnapsack.c
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Knapsack.c
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#include <stdio.h>
#include <stdlib.h>
#include <time.h>
// int BinarySearch(int **arr, int n, int target, int q[])
// {
// int left = 0;
// int right = n - 1;
// int mid;
// while (right >= left)
// {
// mid = left + (right - left) / 2;
// if (arr[mid] == target)
// {
// return mid;
// }
// if (target < arr[mid])
// {
// right = mid - 1;
// }
// else
// {
// left = mid + 1;
// }
// }
// return -1;
// }
int max(int x, int y)
{
if (x > y)
{
return x;
}
else
{
return y;
}
// return x>y?x:y;
}
int knapsack(int W, int wt[], int pro[], int n)
{
int w, i;
int tab[n + 1][W + 1];
// printf("%d %d",n,W);
// for(int e=0;e<=2;e++)
//{
// printf("\n%d %d",wt[e],pro[e]);
//}
for (i = 0; i <= n; i++)
{
for (w = 0; w <= W; w++)
{
if (i == 0 || w == 0)
{
tab[i][w] = 0;
printf("%d\t", tab[i][w]);
}
else if (w >= wt[i - 1])
{
// tab[i][w] = max(tab[i-1][w], tab[i-1][w-wt[i-1]] + pro[i-1]);
// int temp = w - wt[i-1];
if (tab[i - 1][w] >= (tab[i - 1][w - wt[i - 1]] + pro[i - 1]))
{
tab[i][w] = tab[i - 1][w];
}
else
{
tab[i][w] = tab[i - 1][w - wt[i - 1]] + pro[i - 1];
}
printf("%d\t", tab[i][w]);
}
else
{
tab[i][w] = tab[i - 1][w];
printf("%d\t", tab[i][w]);
}
}
printf("\n");
}
printf("\nProfit is %d", tab[n][W]);
printf("\nHere Objects are : \n");
printf("\nObject\tWeight\tProfit");
int profit = tab[n][W];
int q[n];
int r = 0;
for (i = n; i >= 0; i--)
{
int left = 0;
int right = W;
int mid;
int count = 0;
while (right >= left)
{
mid = left + (right - left) / 2;
if (tab[i][mid] == profit)
{
q[r] = i;
count = 1;
break;
}
else if (profit < tab[i][mid])
{
right = mid - 1;
}
else
{
left = mid + 1;
}
}
if (count == 0)//tab[i][mid] != profit)
{
r++;
profit = profit - pro[i];
}
}
for (int a = 0; a <= r; a++)
{
printf("\n%d\t%d\t%d", q[a], wt[q[a] - 1], pro[q[a] - 1]);
}
// for(i=n;i>=0;i--)
// {
// if(tab[n][W] != tab[i-1][W])
// {
// profit = profit - pro[i-1];
// for()
// }
// }
// printf("\n%d", profit);
}
int main()
{
int W = 8;
int wt[3] = {2, 4, 5};
int pro[3] = {3, 5, 8};
int n = sizeof(wt) / sizeof(wt[0]);
knapsack(W, wt, pro, n);
}