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