#include<bits/stdc++.h>
using namespace std;

double Arr[50][50] , x[50], err[3] = {.001 , .05 , .005};
int n;

void seidal(){
    int i, j, flag =0;
    double temp;
    cout<<"n\tx1   E of x1 \t x2 E of x2 \t x3 E of x3\n";
    do{
//            flag = 1;
        for(i=0; i<n; i++){
            temp = x[i];
            x[i] = Arr[i][n];
            for(j=0; j<n; j++){
                if(i != j)
                x[i] -= (Arr[i][j] * x[j]);
            }
            x[i] /= Arr[i][i];
            if( fabs(x[i] - temp) < err[i] )
                flag++;
    cout<<i<<setprecision(4)<<"\t\t"<<x[i]<<"\t\t"<<x[i+1]<<"\t\t   "<<x[i+2]<<endl;
        }
    }while(flag<n);


    cout<<i<<setprecision(4)<<"\t\t"<<x[0]<<"\t\t"<<x[1]<<"\t\t   "<<x[2]<<endl;

}


int main(){
    freopen("input.txt","r",stdin);
    int i,j;
    //cout<<"Enter the row number :";
    cin>>n;
    //cout<<"Enter the co-efficient of x :";
    for(i=0; i<n; i++){
        for(j=0; j<=n; j++){
            cin>>Arr[i][j];
        }
    }

    //cout<<"Enter the guesses value :";
    for(i=0; i<n; i++)
        cin>>x[i];

    seidal();
}