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Detalii evaluare #64348923
Rezumat problemă
#4897
Un număr se numește palindrom dacă prima lui cifră este egală cu ultima, a doua cu penultima și așa mai departe. De exemplu numerele 1221, 505 și 7 sunt palindromuri, în vreme ce 500, 1410 și 2424 nu sunt palindromuri.
Se citește de la tastatură un număr natural n cu cel mult 4 cifre. Să se verifice dacă numărul citit este un palindrom.
Muresan Ciprian (mcip1977) Detalii
| Problema | Pal1234 | Operații I/O |
 tastatură/ecran
|
|---|---|---|---|
| Limita timp | 0.1 secunde | Limita memorie |
Total: 64 MB
/
Stivă 8 MB
|
| Id soluție | #64348923 | Utilizator |
Apostol Andreea (Apostol_Andreea)
|
| Fișier | pal1234.cpp | Dimensiune | 824 B |
| Data încărcării | 01 Mai 2026, 10:43 | Scor/rezultat | Eroare de compilare |
Evaluare
Mesaj compilare
pal1234.cpp: In function ‘int main()’: pal1234.cpp:7:7: error: no match for ‘operator<<’ (operand types are ‘std::istream’ {aka ‘std::basic_istream<char>’} and ‘int’) 7 | cin<<n; | ~~~^~~ | | | | | int | std::istream {aka std::basic_istream<char>} pal1234.cpp:7:7: note: candidate: ‘operator<<(int, int)’ (built-in) 7 | cin<<n; | ~~~^~~ pal1234.cpp:7:7: note: no known conversion for argument 1 from ‘std::istream’ {aka ‘std::basic_istream<char>’} to ‘int’ In file included from /usr/include/c++/13/string:54, from /usr/include/c++/13/bits/locale_classes.h:40, from /usr/include/c++/13/bits/ios_base.h:41, from /usr/include/c++/13/ios:44, from /usr/include/c++/13/ostream:40, from /usr/include/c++/13/iostream:41, from pal1234.cpp:1: /usr/include/c++/13/bits/basic_string.h:4032:5: note: candidate: ‘template<class _CharT, class _Traits, class _Alloc> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const __cxx11::basic_string<_CharT, _Traits, _Alloc>&)’ 4032 | operator<<(basic_ostream<_CharT, _Traits>& __os, | ^~~~~~~~ /usr/include/c++/13/bits/basic_string.h:4032:5: note: template argument deduction/substitution failed: pal1234.cpp:7:9: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’ 7 | cin<<n; | ^ In file included from /usr/include/c++/13/bits/ios_base.h:46: /usr/include/c++/13/system_error:339:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const error_code&)’ 339 | operator<<(basic_ostream<_CharT, _Traits>& __os, const error_code& __e) | ^~~~~~~~ /usr/include/c++/13/system_error:339:5: note: template argument deduction/substitution failed: pal1234.cpp:7:9: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’ 7 | cin<<n; | ^ /usr/include/c++/13/ostream:554:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _CharT)’ 554 | operator<<(basic_ostream<_CharT, _Traits>& __out, _CharT __c) | ^~~~~~~~ /usr/include/c++/13/ostream:554:5: note: template argument deduction/substitution failed: pal1234.cpp:7:9: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’ 7 | cin<<n; | ^ /usr/include/c++/13/ostream:564:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, char)’ 564 | operator<<(basic_ostream<_CharT, _Traits>& __out, char __c) | ^~~~~~~~ /usr/include/c++/13/ostream:564:5: note: template argument deduction/substitution failed: pal1234.cpp:7:9: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’ 7 | cin<<n; | ^ /usr/include/c++/13/ostream:570:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, char)’ 570 | operator<<(basic_ostream<char, _Traits>& __out, char __c) | ^~~~~~~~ /usr/include/c++/13/ostream:570:5: note: template argument deduction/substitution failed: pal1234.cpp:7:9: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<char, _Traits>’ 7 | cin<<n; | ^ /usr/include/c++/13/ostream:581:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, signed char)’ 581 | operator<<(basic_ostream<char, _Traits>& __out, signed char __c) | ^~~~~~~~ /usr/include/c++/13/ostream:581:5: note: template argument deduction/substitution failed: pal1234.cpp:7:9: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<char, _Traits>’ 7 | cin<<n; | ^ /usr/include/c++/13/ostream:586:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, unsigned char)’ 586 | operator<<(basic_ostream<char, _Traits>& __out, unsigned char __c) | ^~~~~~~~ /usr/include/c++/13/ostream:586:5: note: template argument deduction/substitution failed: pal1234.cpp:7:9: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<char, _Traits>’ 7 | cin<<n; | ^ /usr/include/c++/13/ostream:645:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const _CharT*)’ 645 | operator<<(basic_ostream<_CharT, _Traits>& __out, const _CharT* __s) | ^~~~~~~~ /usr/include/c++/13/ostream:645:5: note: template argument deduction/substitution failed: pal1234.cpp:7:9: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’ 7 | cin<<n; | ^ In file included from /usr/include/c++/13/ostream:880: /usr/include/c++/13/bits/ostream.tcc:307:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const char*)’ 307 | operator<<(basic_ostream<_CharT, _Traits>& __out, const char* __s) | ^~~~~~~~ /usr/include/c++/13/bits/ostream.tcc:307:5: note: template argument deduction/substitution failed: pal1234.cpp:7:9: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<_CharT, _Traits>’ 7 | cin<<n; | ^ /usr/include/c++/13/ostream:662:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, const char*)’ 662 | operator<<(basic_ostream<char, _Traits>& __out, const char* __s) | ^~~~~~~~ /usr/include/c++/13/ostream:662:5: note: template argument deduction/substitution failed: pal1234.cpp:7:9: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<char, _Traits>’ 7 | cin<<n; | ^ /usr/include/c++/13/ostream:675:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, const signed char*)’ 675 | operator<<(basic_ostream<char, _Traits>& __out, const signed char* __s) | ^~~~~~~~ /usr/include/c++/13/ostream:675:5: note: template argument deduction/substitution failed: pal1234.cpp:7:9: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<char, _Traits>’ 7 | cin<<n; | ^ /usr/include/c++/13/ostream:680:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, const unsigned char*)’ 680 | operator<<(basic_ostream<char, _Traits>& __out, const unsigned char* __s) | ^~~~~~~~ /usr/include/c++/13/ostream:680:5: note: template argument deduction/substitution failed: pal1234.cpp:7:9: note: ‘std::istream’ {aka ‘std::basic_istream<char>’} is not derived from ‘std::basic_ostream<char, _Traits>’ 7 | cin<<n; | ^ /usr/include/c++/13/ostream:801:5: note: candidate: ‘template<class _Ostream, class _Tp> _Ostream&& std::operator<<(_Ostream&&, const _Tp&)’ 801 | operator<<(_Ostream&& __os, const _Tp& __x) | ^~~~~~~~ /usr/include/c++/13/ostream:801:5: note: template argument deduction/substitution failed: /usr/include/c++/13/ostream: In substitution of ‘template<class _Ostream, class _Tp> _Ostream&& std::operator<<(_Ostream&&, const _Tp&) [with _Ostream = std::basic_istream<char>&; _Tp = int]’: pal1234.cpp:7:9: required from here /usr/include/c++/13/ostream:801:5: error: no type named ‘type’ in ‘struct std::enable_if<false, void>’ pal1234.cpp:13:25: error: expected ‘;’ before string constant 13 | if(a==b) cout "DA"; | ^~~~~ | ; pal1234.cpp:13:21: warning: statement has no effect [-Wunused-value] 13 | if(a==b) cout "DA"; | ^~~~ pal1234.cpp:14:21: error: expected ‘;’ before string constant 14 | else cout "NU"; | ^~~~~ | ; pal1234.cpp:14:17: warning: statement has no effect [-Wunused-value] 14 | else cout "NU"; | ^~~~ pal1234.cpp:32:46: error: expected ‘;’ before string constant 32 | if(a==d and b==c) cout"DA"; | ^~~~ | ; pal1234.cpp:32:42: warning: statement has no effect [-Wunused-value] 32 | if(a==d and b==c) cout"DA"; | ^~~~
Cum funcționează evaluarea?
www.pbinfo.ro permite evaluarea a două tipuri de probleme:
- probleme la care rezolvarea presupune scrierea unui program complet
- probleme la care rezolvarea presupune scrierea unei secvențe de program - câteva instrucțiuni, o listă de declarații, una sau mai multe funcții, etc.
Problema Pal1234 face parte din prima categorie. Soluția propusă de tine va fi evaluată astfel:
- Programul sursă este compilat folosind compilatorul corespunzător. Dacă în urma compilării se obțin erori sau avertismente, acestea sunt afișate în această pagină.
- Dacă programul a fost compilat, executabilul obținut va fi rulat, furnizându-i-se unul sau mai multe seturi de date de intrare, în concordanță cu restricțiile specifice problemei. Pentru fiecare set de date se obține un anumit punctaj, în raport cu corectitudinea soluției tale.
Suma punctajelor acordate pe testele utilizate pentru verificare este 100. Astfel, soluția ta poate obține cel mult 100 de puncte, caz în care se poate considera corectă.