题解 | 构造数独

#include<iostream>
using namespace std;

int main(){
    int n,k;
    cin>>n>>k;

    int i,j;
    for(i=1;i<=n;i++){
        for(j=1;j<=n;j++){
            if(j==i){
                cout<<k;
            }else{
                cout<<0;
            }
            if(j!=n){
                cout<<" ";
            }
        }
        cout<<endl;
    }

    return 0;
}