uses crt;

var a,b,c: integer;

begin

clrscr;

write('nhap a,b,c: '); readln(a,b,c);

if (a+b>c) and (b+c>a) and (a+c>b) then writeln('a,b,c la ba canh cua 1 tam giac thuong')

else writeln('a,b,c khong phai la ba canh cua 1 tam giac thuong');

if (a=b) or (b=c) or (a=c) then writeln('a,b,c la ba canh cua 1 tam giac can')

else writeln('a,b,c khong phai la ba canh cua 1 tam giac can');

if (a=b) and (b=c) then writeln('a,b,c la ba canh cua 1 tam giac deu')

else writeln('a,b,c khong phai la ba canh cua 1 tam giac deu');

readln;

end.

#include <iostream>
using namespace std;
int main(){
    long a,b,c;
    cin >> a >> b >> c;
    if (a+b>c and a+c>b and b+c>a){
        if (a==b and b==c and a==c) cout << "la 3 canh cua tam giac deu";
        else if (a==b or a==c or b==c) cout << "la 3 canh cua tam giac can";
        else cout << "la 3 canh cua tam giac thuong";
    }
    else{
        cout << "khong la 3 canh cua 1 tam giac";
    }
}

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