#include<iostream.h>
#include<conio.h>
#include<iomanip.h>
int main(){
clrscr();
long double a[10][10],m,u;
int p=0,y=0,b,l;
cout<<"cin:";
for(int r=2;r<=20;r=r+2){
for(int d=1;d<=55;d=d+6){
gotoxy(d,r);
cin>>a[p][y];
y++;}
p++;y=0;}cout<<endl<<"cout:";
for(int k=0;k<=8;k++){l=0;b=k+1;
for(int f=k;f<=9;f++){
if(a[f][k]!=0)l++;}
if(l!=0){
while(a[k][k]==0){
for(int r=0;r<10;r++){
u=a[k][r];
a[k][r]=a[b][r];
a[b][r]=u;}
b++;}
for(int i=k+1;i<=9;i++){
m=a[i][k]/a[k][k];
for(int j=0;j<=9;j++)
a[i][j]=a[i][j]-m*a[k][j];}}}
p=0;y=0;
for(int z=24;z<=42;z=z+2){
for(int x=1;x<=55;x=x+6){
if(a[p][y]<0.00001)a[p][y]=0;
gotoxy(x,z);
cout<<setprecision(3)<<a[p][y];
y++;}
p++;y=0;}
getch();
return 0;}