#include <bits/stdc++.h>

using namespace std;

double a,b,c,tb;

int main()

{

cin>>a>>b>>c;

tb=(a+b+c)/3;

cout<<fixed<<setprecision(1)<<tb<<endl;

if (tb>=8) cout<<"Gioi";

else if ((6.5<=tb) and (tb<8)) cout<<"Kha";

else if ((5<=tb) and (tb<=6.5)) cout<<"Trung Binh";

else cout<<"Chua dat";

return 0;

}

var t,dt,a,tb: real;

begin

write('Nhap diem mon Toan: '); readln(t);

write('nhap diem mon Tin: '); readln(dt);

write('Nhap diem mon Anh: '); readln(a);

if (a<=0) or (a>=10) or (t<=0) or (t>=10) or (dt<=0) or (dt>=10) then

repeat

writeln('Khong hop le, nhap lai: ');

write('Nhap diem mon Toan: '); readln(t);

write('nhap diem mon Tin: '); readln(dt);

write('Nhap diem mon Anh: '); readln(a);

until (a>=0) and (a<=10) and (t>=0) and (t<=10) and (dt>=0) and (dt<=10);

tb:=(t+dt+a)/3;

writeln('Diem trung binh: ',tb:2:1);

if (dt>=6.5) and (t>=6.5) and (a>=6.5) and (tb>=8) then writeln('Gioi') else

if (dt>=5) and (t>=5) and (a>=5) and (tb>=6.5) then writeln('Kha') else writeln('Trung binh');

end.

uses crt;

var toan,tin,anh,tb:real;

kt:integer;

begin

clrscr;

repeat

write('Nhap diem Toan:'); readln(toan);

write('Nhap diem Tin:'); readln(tin);

write('Nhap diem Anh:'); readln(anh);

until (0<=toan) and (toan<=10) and (0<=tin) and (tin<=10) and (0<=anh) and (anh<=10);

tb:=(toan+tin+anh)/3;

writeln('Diem trung binh cua 3 mon la: ',tb:4:2);

kt:=0;

if (tb>=8) and (toan>=6.5) and (tin>=6.5) and (anh>=6.5) then kt:=1;

if (6.5<=tb) and (tb<8) and (5<=toan) and (toan<6.5) and (5<=tin) and (tin<6.5) and (5<=anh) and (anh<6.5) then kt:=2;

if kt=0 then writeln('Hoc sinh trung binh');

if kt=1 then writeln('Hoc sinh gioi');

if kt=2 then writeln('Hoc sinh kha');

readln;

end.

#include <bits/stdc++.h>

using namespace std;

double a[10],b,c,tb;

int n,i,dem;

int main()

{

cout<<"Nhap so cot thuong xuyen:"; cin>>n;

tb=0;

for (i=1; i<=n; i++)

{

cin>>a[i];

tb=tb+a[i];

}

cin>>b>>c;

tb=tb+b+c;

cout<<fixed<<setprecision(2)<<tb/(n+2)<<endl;

if (tb>=8) cout<<"Gioi";

else if ((tb>=6.5) and (tb<8)) cout<<"Kha";

else if ((tb>=5) and (tb<6.5)) cout<<"Trung binh";

else cout<<"Yeu";

return 0;

}

#include <bits/stdc++.h>

using namespace std;

double a[10],b,c,tb;

int i,n;

int main()

{

cout<<"Nhap so cot thuong xuyen:"; cin>>n;

for (i=1; i<=n; i++) cin>>a[i];

cout<<"Nhap diem giua ki:"; cin>>b;

cout<<"Nhap diem cuoi ki:"; cin>>c;

tb=0;

for (i=1; i<=n; i++) tb=tb+a[i];

tb=tb+b+c;

tb=tb/((n+2)*1.0);

cout<<fixed<<setprecision(2)<<tb<<endl;

if (tb>=8) cout<<"Gioi";

else if ((tb>=6.5) and (tb<8)) cout<<"Kha";

else if ((tb>=5) and (tb<6.5)) cout<<"Trung binh";

else cout<<"Yeu";

return 0;

}

uses crt;

var a:array[1..100]of real;

i,n,dem1,dem2,dem3,dem4:integer;

begin

clrscr;

readln(n);

for i:=1 to n do readln(a[i]);

dem1:=0;

dem2:=0;

dem3:=0;

dem4:=0;

for i:=1 to n do 

  begin

 if (a[i]>=8) then inc(dem1);

if (6.5<=a[i]) and (a[i]<=7.9) then inc(dem2);

if (5<=a[i]) and (a[i]<=6.4) then inc(dem3);

if (a[i]<5) then inc(dem4);

end;

writeln('So hoc sinh gioi la: ',dem1);

writeln('So hoc sinh kha la: ',dem2);

writeln('So hoc sinh trung binh la: ',dem3);

writeln('So hoc sinh kem la: ',dem4);

readln;

end.

program DiemTB;

var

      diemToan, diemVan, diemTB: real;

begin

      write('Nhap diem mon Toan: ');

      readln(diemToan);

      write('Nhap diem mon Van: ');

      readln(diemVan);

      diemTB := (diemToan + diemVan) / 2;

      writeln('Diem trung binh: ', diemTB:0:2);

      if diemTB >= 5 then

            writeln('Chuc mung! Ban da dau ky thi.')

      else

            writeln('Rat tiec! Ban da truot ky thi.');

      readln;

end.

uses crt;

var a:array[1..10]of integer;

i,n,tb:integer;

begin

clrscr;

for i:=1 to 10 do 

  begin

write('A[',i,']='); readln(a[i]);

end;

for i:=1 to 10 do 

  if a[i]>=8 then write(a[i]:4);

tb:=0;

for i:=1 to 10 do 

  tb:=tb+a[i];

writeln;

writeln('Diem trung binh cua 10 ban la: ',tb:4:2);

readln;

end.