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- #include <fstream>
- #define N 1000
- using namespace std;
- int a[N][N],b[N][N],c[N][N];
- int main()
- {
- int n,m;
- ifstream f("mmultiplication.in");
- f>>n>>m;
- for(int i=0;i<n;++i)
- for(int j=0;j<m;++j)
- f>>a[i][j];
- int p,q;
- f>>p>>q;
- ofstream g("mmultiplication.out");
- if(m!=p)
- {
- g<<-1;
- return 0;
- }
- p=q;
- for(int i=0;i<m;++i)
- for(int j=0;j<p;++j)
- f>>b[i][j];
- for(int i=0;i<n;++i)
- for(int j=0;j<p;++j)
- for(int k=0;k<m;++k)
- c[i][j]+=a[i][k]*b[k][j];
- for(int i=0;i<n;++i)
- {
- for(int j=0;j<p;++j)
- g<<c[i][j]<<' ';
- g<<endl;
- }
- return 0;
- }
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