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