uva 147 - Dollars

背包

#include <cstdio>
#include <cstring>

int coin[]={5,10,20,50,100,200,500,1000,2000,5000,10000};
long long dp[11][30010];
char s[10];
int solve()
{
    int i=0;
    int sum=0;
    for(i=0; s[i]!='.'; i++)
        sum=sum*10+s[i]-'0';
    for(int j=i+1; s[j]!='\0'; j++)
        sum=sum*10+s[j]-'0';
    return sum;
}
long long dfs(int cur, int sum)
{
    if(sum==0)
        return dp[cur][sum]=1;
    if(dp[cur][sum]!=-1)
        return dp[cur][sum];
    dp[cur][sum]=0;
    for(int i=cur; i<11; i++)
    {
        if(sum>=coin[i])
         dp[cur][sum]+=dfs(i,sum-coin[i]);
    }
    return dp[cur][sum];
}
int main()
{
    memset(dp, -1, sizeof(dp));
    while(scanf("%s",s)==1 && strcmp(s,"0.00"))
    {
         int n=solve();
         printf("%6s%17lld\n",s,dfs(0,n));
     }
    return 0;
}