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- //@and
- #include <iostream>
- using namespace std;
- int a[101][101],i,j,m,n;
- int div(int a[101][101], int l1, int c1, int l2, int c2)
- {
- if(l1==l2)
- {
- int sol=0;
- for(int j=c1;j<=c2;j++)
- {
- if(a[l1][j]%2==0) sol+=a[l1][j];
- }
- return sol;
- }
- else
- {
- int m1=(c1+c2)/2;
- int m2=(l1+l2)/2;
- return div(a,l1,c1,m2,m1)+div(a,l1,m1+1,m2,c2)+div(a,m2+1,c1,l2,m1)+div(a,m2+1,m1+1,l2,c2);
- }
- }
- int main()
- {
- cin>>m>>n;
- for(i=1;i<=m;i++) for(j=1;j<=n;j++) cin>>a[i][j];
- cout<<div(a,1,1,m,n);
- }
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