钱币兑换问题--hdu1284

#include<iostream>
#include<cstdio>
#include<cstring>
#include<cstdlib>
#include<algorithm>
using namespace std;
#define N 32770
int main()
{
    int i,j,n,v[4]={0,1,2,3};
    int dp[N]={1};

    for(i=1;i<=3;i++)
    {
        for(j=v[i];j<N;j++)
        {
            dp[j]+=dp[j-v[i]];
        }
    }
    while(scanf("%d",&n)!=EOF)
    {
        printf("%d\n",dp[n]);
    }
    return 0;
}

#include<stdio.h>
#include<algorithm>
#include<string.h>
#define N 10

using namespace std;
int main() 
{
    int n,s,i;
    while(scanf("%d",&n)!=EOF)
    {
        s=0;
        for(i=0;i<=n/3;i++)
        {
            s+=(n-i*3)/2+1;
        }
        printf("%d\n",s);
    }
    return 0;
}