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- #include <iostream>
- using namespace std;
- int a[101][101],n,m;
- int main()
- {
- int cnt=0;
- cin>>n>>m;
- for(int i=1;i<=n;i++)
- for(int j=1;j<=m;j++)
- cin>>a[i][j];
- for(int i=1;i<=n-1;i++)
- for(int j=1;j<=m;j++)
- {
- if(a[i][j]!=a[i+1][j])
- break;
- if(a[i][j]==a[i+1][j] && j==m)
- cnt++;
- }
- cout<<cnt;
- }
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