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#include <bits/stdc++.h>
using namespace std;
long long a,b;
int main()
{
freopen("sn.inp","r",stdin);
freopen("cn.out","w",stdout);
cin>>a>>b;
cout<<a*b;
return 0;
}
const fi='hinhtron.inp';
fo='hinhtron.out';
var f1,f2:text;
a:array[1..100]of real;
i,n:integer;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
n:=0;
while not eof(f1) do
begin
n:=n+1;
read(f1,a[n]);
end;
for i:=1 to n do
writeln(f2,'Hinh tron thu ',i,': Chu vi la ',(2*a[n]*pi):4:2,' va Dien tich la: ',a[n]*a[n]*pi:4:2);
close(f1);
close(f2);
end.
program TinhDienTichHinhTron;
var
fIn, fOut: Text;
r: Integer;
dien_tich: Real;
begin
Assign(fIn, 'dt_ht.inp');
Reset(fIn);
Readln(fIn, r);
Close(fIn);
Assign(fOut, 'dt_ht.out');
Rewrite(fOut);
dien_tich := Pi * r * r;
Writeln(fOut, FormatFloat('0.00', dien_tich));
Close(fOut);
end.
#include <bits/stdc++.h>
using namespace std;
long long a[10],b[10],i,j;
int main()
{
freopen("input.txt","r",stdin);
freopen("output.txt","w",stdout);
for (i=1; i<=10; i++) cin>>a[i];
for (j=1; j<=10; j++) cin>>b[j];
for (i=1; i<=10; i++)
cout<<a[i]+b[i]<<" ";
return 0;
}
const fi='dulieu.txt';
fo='ketqua.txt';
var i,t:integer;
f1,f2:text;
a:array[1..9]of integer;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
t:=0;
for i:=1 to 9 do
begin
read(f1,a[i]);
t:=t+a[i];
end;
writeln(f2,t);
close(f1);
close(f2);
end.
const fi='dataln.txt';
fo='dataout.txt';
var f1,f2:text;
x,i,t:integer;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
t:=0;
for i:=1 to 24 do
begin
read(f1,x);
t:=t+x;
end;
writeln(f2,t);
close(f1);
close(f2);
end.
const fi='hcn.txt';
fo='ketqua.txt';
var f1,f2:text;
a,b:array[1..100]of integer;
n:integer;
cv,dt:real;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
n:=0;
while not eof(f1) do
begin
inc(n);
readln(f1,a[n],b[n]);
end;
for i:=1 to n do
begin
cv:=(a[i]+b[i])/2;
dt:=a[i]*b[i];
writeln(f2,cv:4:2,' ',dt:4:2);
end;
close(f1);
close(f2);
end.