母函数水过
#include<stdio.h>
#include<string.h>
int main()
{
int i,j,n,c1[50],c2[50],a[10],b[10],h,K,t;
scanf("%d",&t);
while(t--)
{
scanf("%d%d",&K,&n);
for(i=0;i<n;i++)
scanf("%d%d",&a[i],&b[i]);
memset(c1,0,sizeof(c1));
memset(c2,0,sizeof(c2));
c1[0]=1;
for(i=0;i<n;i++)
{
for(j=0;j<=K;j++)
for(h=0;h<=b[i]&&h*a[i]+j<=K;h++)
c2[j+h*a[i]]+=c1[j];
for(j=0;j<=K;j++)
......
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