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![](https://rs.olm.vn/images/avt/0.png?1311)
#include <bits/stdc++.h>
using namespace std;
double a,b,c,h,p,s;
int main()
{
cin>>a>>b>>c;
p=(a+b+c)/2;
s=sqrt(p*(p-a)*(p-b)*(p-c));
if (s>50) cout<<"Dien tich tam giac lon hon";
else cout<<"Dien tich tam giac nho hon";
return 0;
}
![](https://rs.olm.vn/images/avt/0.png?1311)
uses crt;
var n,i:integer;
m:real;
begin
clrscr;
repeat
write('Nhap n='); readln(n);
until (1<=n) and (n<=30000);
m:=0;
for i:=1 to n do
m:=m+sqrt(i);
writeln('m=',m:4:2);
readln;
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
uses crt;
var a:array[1..100]of integer;
i,n,t,ln,nn:integer;
begin
clrscr;
readln(n);
for i:=1 to n do readln(a[i]);
t:=0;
for i:=1 to n do
if a[i]>0 then t:=t+a[i];
ln:=a[1];
nn:=a[1];
for i:=1 to n do
begin
if ln<a[i] then ln:=a[i];
if nn>a[i] then nn:=a[i];
end;
writeln(t);
writeln(ln);
writeln(nn);
readln;
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
Bài 2:
#include <bits/stdc++.h>
using namespace std;
long long x,y;
int main()
{
cin >>x>>y;
cout<<x<<" "<<y;
swap(x,y);
cout<<x<<" "<<y;
return 0;
}
![](https://rs.olm.vn/images/avt/0.png?1311)
uses crt;
var a,b,c,p,s:real;
begin
clrscr;
readln(a,b,c);
if (a>0) and (b>0) and (c>0) and (a+b>c) and (a+c>b) and (b+c>a) then
begin
p=(a+b+c)/2;
s=sqrt(p*(p-a)*(p-b)*(p-c));
writeln('Chu vi la: ',p*2:4:2);
writeln('Dien tich la: ',s:4:2);
end
else writeln('a,b,c khong la ba canh cua tam giac');
readln;
end.