Charm Bracelet
Description
Bessie has gone to the mall's jewelry store and spies a charm bracelet. Of course, she'd like to fill it with the best charms possible from the N (1 ≤ N≤ 3,402) available charms. Each charm i in the supplied list has a weight Wi (1 ≤ Wi ≤ 400), a 'desirability' factor Di (1 ≤ Di ≤ 100), and can be used at most once. Bessie can only support a charm bracelet whose weight is no more than M (1 ≤ M ≤ 12,880).
Given that weight limit as a constraint and a list of the charms with their weights and desirability rating, deduce the maximum possible sum of ratings.
Input
Output
* Line 1: A single integer that is the greatest sum of charm desirabilities that can be achieved given the weight constraints
Sample Input
4 61 42 63 122 7
Sample Output
23
dp[i][v]=max{dp[i-1][v],dp[i-1][v-c[i]]+w[i]}
#include<stdio.h>
#include<string.h>
int main()
{
int i,N,M,w[3500],D[3500],dp[13000],j;
while(scanf("%d%d",&N,&M)!=EOF)
{
memset(dp,0,sizeof(dp));
for(i=1; i<=N; i++)
{
scanf("%d%d",&w[i],&D[i]);
}
for(i=1; i<=N; i++)
{
for(j=M; j>=0; j--)
{
if(j-w[i]>=0)
dp[j]=dp[j]>dp[j-w[i]]+D[i]? dp[j]:dp[j-w[i]]+D[i];
else
dp[j]=dp[j];
}
}
printf("%d\n",dp[M]);
}
}