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这样做为什么错了,不是背包吗,难道有特殊数据#include<iostream> #include<cmath> using namespace std; int N[21][15100]={0}; int main() { int n,m; int M[20]; int i,j,k; while(scanf("%d %d",&n,&m)!=EOF){ for(i=0;i<=m;i++)memset(N[i],0,sizeof(N[i])); for(i=0;i<n;i++)scanf("%d",&M[i]); N[0][7500]=1; for(i=1;i<=m;i++){ int num; scanf("%d",&num); for(j=0;j<=15000;j++){ if(N[i-1][j]){ for(k=0;k<n;k++)N[i][j+num*M[k]]++; } } } printf("%d\n",N[m][7500]); } return 0; } Followed by:
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