#include <iostream>
using namespace std;
int main()
{
int n;
cin >> n; //è¾å
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int a[n][n];
for(int i=0;i<n;i++){ //对æ°ç»è¿è¡èµå¼
for(int j=0;j<n;j++){
if(i == j)
a[i][j] = 1;
else
a[i][j] = 0;
}
}
//ç»æçè¾åº
for(int i=0;i<n;i++){
for(int j=0;j<n;j++){
cout << a[i][j] << " ";
}
cout << endl;
}
return 0;
}
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