hdu 2566 统计硬币(母函数)

#include<iostream>
#include<cstdio>
#include<cstring>
#include<algorithm>
using namespace std;
int c1[1010][1010],c2[1010][1010];
int main(){
int n,m,i,j,k,t,h;
scanf("%d",&t);
while(t--){
memset(c2,0,sizeof(c2));
memset(c1,0,sizeof(c1));
scanf("%d%d",&n,&m);
for(i=0;i<=n;i++){//初始化
c1[i][i]=1;
}
for(i=2;i<=5;i+=3){
for(j=0;j<=m;j++){
for(k=0;k*i+j<=m&&k<=n;k++){//计算钱数
for(h=0;k+h<=n;h++)//计算个数
c2[j+k*i][k+h]+=c1[j][h];
}
}
for(j=0;j<=m;j++)
for(k=0;k<=n;k++){
c1[j][k]=c2[j][k];
c2[j][k]=0;
}
}
printf("%d\n",c1[m]
);
}
return 0;
}