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- // Tong bien cua ma tran
- // Khai bao ham thu vien neu co
- #include<stdio.h>
- #include<conio.h>
- #define SIZE 100
- void nhap(int a[][SIZE],int &m,int &n)
- {
- scanf("%d%d",&m,&n);
- for(int i=0;i<m;i++)
- {
- for(int j=0;j<n;j++)
- {
- scanf("%d",&a[i][j]);
- }
- }
- }
- long tongbien(int a[][SIZE],int m,int n)
- {
- long s=0;
- for(int j=0;j<n;j++)
- {
- s=s+a[0][j];
- s=s+a[m-1][j];
- }
- for(int i=1;i<m-1;i++)
- {
- s=s+a[i][0];
- s=s+a[i][n-1];
- }
- return s;
- }
- void main()
- {
- int a[SIZE][SIZE],m,n;
- nhap(a,m,n);
- printf("%ld",tongbien(a,m,n));
- }
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