Detalii evaluare: ~55595072

Detalii evaluare #55595072

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`#2337` Coada2

Andrei și Mihai stau la coada la magazin pentru a-și cumpăra bomboane. Andrei este în fața lui Mihai la coadă, iar între cei doi se afla alte x persoane. Mihai a observat că în total, în fata lui , se afla y persoane, iar Andrei a observat că în spatele lui se află z persoane.

Știind numerele x y z , aflați câte persoane sunt la coadă în total. Uneori, însă, e posibil ca aceștia să fi numărat greșit numărul de persoane, și să nu se poată calcula numărul total de persoane din coada. În acest caz trebuie sa afișați -1.

Infogim Runda a 2-a, clasa a V-a

Clasa 9 Elemente de baza ale limbajului Operatori și expresii

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Detalii

Problema	Coada2	Operații I/O	`coada2.in`/`coada2.out`
Limita timp	0.1 secunde	Limita memorie	Total: `64 MB` / Stivă `16 MB`
Id soluție	`#55595072`	Utilizator	Popescu Radu (RaduPopescu1245)
Fișier	coada2.cpp	Dimensiune	256 B
Data încărcării	20 Ianuarie 2025, 09:08	Scor / rezultat	Eroare de compilare

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Mesaj compilare

coada2.cpp: In function 'int main()':
coada2.cpp:10:25: error: no match for 'operator>>' (operand types are 'std::ofstream {aka std::basic_ofstream<char>}' and 'const char [3]')
     if(x>=y||x>=z) {fout>>"-1";}

                         ^
coada2.cpp:10:25: note: candidates are:
In file included from /usr/include/c++/4.8/string:53:0,
                 from /usr/include/c++/4.8/bits/locale_classes.h:40,
                 from /usr/include/c++/4.8/bits/ios_base.h:41,
                 from /usr/include/c++/4.8/ios:42,
                 from /usr/include/c++/4.8/ostream:38,
                 from /usr/include/c++/4.8/iostream:39,
                 from coada2.cpp:1:
/usr/include/c++/4.8/bits/basic_string.tcc:996:5: note: template<class _CharT, class _Traits, class _Alloc> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::basic_string<_CharT, _Traits, _Alloc>&)
     operator>>(basic_istream<_CharT, _Traits>& __in,
     ^
/usr/include/c++/4.8/bits/basic_string.tcc:996:5: note:   template argument deduction/substitution failed:
coada2.cpp:10:27: note:   'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<_CharT, _Traits>'
     if(x>=y||x>=z) {fout>>"-1";}

                           ^
In file included from /usr/include/c++/4.8/istream:882:0,
                 from /usr/include/c++/4.8/iostream:40,
                 from coada2.cpp:1:
/usr/include/c++/4.8/bits/istream.tcc:955:5: note: template<class _CharT2, class _Traits2> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, _CharT2*)
     operator>>(basic_istream<_CharT, _Traits>& __in, _CharT* __s)
     ^
/usr/include/c++/4.8/bits/istream.tcc:955:5: note:   template argument deduction/substitution failed:
coada2.cpp:10:27: note:   'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<_CharT, _Traits>'
     if(x>=y||x>=z) {fout>>"-1";}

                           ^
In file included from /usr/include/c++/4.8/istream:882:0,
                 from /usr/include/c++/4.8/iostream:40,
                 from coada2.cpp:1:
/usr/include/c++/4.8/bits/istream.tcc:923:5: note: template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, _CharT&)
     operator>>(basic_istream<_CharT, _Traits>& __in, _CharT& __c)
     ^
/usr/include/c++/4.8/bits/istream.tcc:923:5: note:   template argument deduction/substitution failed:
coada2.cpp:10:27: note:   'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<_CharT, _Traits>'
     if(x>=y||x>=z) {fout>>"-1";}

                           ^
In file included from /usr/include/c++/4.8/iostream:40:0,
                 from coada2.cpp:1:
/usr/include/c++/4.8/istream:727:5: note: template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(std::basic_istream<char, _Traits>&, unsigned char&)
     operator>>(basic_istream<char, _Traits>& __in, unsigned char& __c)
     ^
/usr/include/c++/4.8/istream:727:5: note:   template argument deduction/substitution failed:
coada2.cpp:10:27: note:   'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<char, _Traits>'
     if(x>=y||x>=z) {fout>>"-1";}

                           ^
In file included from /usr/include/c++/4.8/iostream:40:0,
                 from coada2.cpp:1:
/usr/include/c++/4.8/istream:732:5: note: template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(std::basic_istream<char, _Traits>&, signed char&)
     operator>>(basic_istream<char, _Traits>& __in, signed char& __c)
     ^
/usr/include/c++/4.8/istream:732:5: note:   template argument deduction/substitution failed:
coada2.cpp:10:27: note:   'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<char, _Traits>'
     if(x>=y||x>=z) {fout>>"-1";}

                           ^
In file included from /usr/include/c++/4.8/iostream:40:0,
                 from coada2.cpp:1:
/usr/include/c++/4.8/istream:774:5: note: template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(std::basic_istream<char, _Traits>&, unsigned char*)
     operator>>(basic_istream<char, _Traits>& __in, unsigned char* __s)
     ^
/usr/include/c++/4.8/istream:774:5: note:   template argument deduction/substitution failed:
coada2.cpp:10:27: note:   'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<char, _Traits>'
     if(x>=y||x>=z) {fout>>"-1";}

                           ^
In file included from /usr/include/c++/4.8/iostream:40:0,
                 from coada2.cpp:1:
/usr/include/c++/4.8/istream:779:5: note: template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(std::basic_istream<char, _Traits>&, signed char*)
     operator>>(basic_istream<char, _Traits>& __in, signed char* __s)
     ^
/usr/include/c++/4.8/istream:779:5: note:   template argument deduction/substitution failed:
coada2.cpp:10:27: note:   'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<char, _Traits>'
     if(x>=y||x>=z) {fout>>"-1";}

                           ^
In file included from /usr/include/c++/4.8/iostream:40:0,
                 from coada2.cpp:1:
/usr/include/c++/4.8/istream:872:5: note: template<class _CharT, class _Traits, class _Tp> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&&, _Tp&)
     operator>>(basic_istream<_CharT, _Traits>&& __is, _Tp& __x)
     ^
/usr/include/c++/4.8/istream:872:5: note:   template argument deduction/substitution failed:
coada2.cpp:10:27: note:   'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<_CharT, _Traits>'
     if(x>=y||x>=z) {fout>>"-1";}

                           ^
coada2.cpp:11:15: error: no match for 'operator>>' (operand types are 'std::ofstream {aka std::basic_ofstream<char>}' and 'long long int')
     else {fout>>y+z-x;}

               ^
coada2.cpp:11:15: note: candidates are:
In file included from /usr/include/c++/4.8/string:53:0,
                 from /usr/include/c++/4.8/bits/locale_classes.h:40,
                 from /usr/include/c++/4.8/bits/ios_base.h:41,
                 from /usr/include/c++/4.8/ios:42,
                 from /usr/include/c++/4.8/ostream:38,
                 from /usr/include/c++/4.8/iostream:39,
                 from coada2.cpp:1:
/usr/include/c++/4.8/bits/basic_string.tcc:996:5: note: template<class _CharT, class _Traits, class _Alloc> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::basic_string<_CharT, _Traits, _Alloc>&)
     operator>>(basic_istream<_CharT, _Traits>& __in,
     ^
/usr/include/c++/4.8/bits/basic_string.tcc:996:5: note:   template argument deduction/substitution failed:
coada2.cpp:11:21: note:   'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<_CharT, _Traits>'
     else {fout>>y+z-x;}

                     ^
In file included from /usr/include/c++/4.8/istream:882:0,
                 from /usr/include/c++/4.8/iostream:40,
                 from coada2.cpp:1:
/usr/include/c++/4.8/bits/istream.tcc:955:5: note: template<class _CharT2, class _Traits2> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, _CharT2*)
     operator>>(basic_istream<_CharT, _Traits>& __in, _CharT* __s)
     ^
/usr/include/c++/4.8/bits/istream.tcc:955:5: note:   template argument deduction/substitution failed:
coada2.cpp:11:21: note:   'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<_CharT, _Traits>'
     else {fout>>y+z-x;}

                     ^
In file included from /usr/include/c++/4.8/istream:882:0,
                 from /usr/include/c++/4.8/iostream:40,
                 from coada2.cpp:1:
/usr/include/c++/4.8/bits/istream.tcc:923:5: note: template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, _CharT&)
     operator>>(basic_istream<_CharT, _Traits>& __in, _CharT& __c)
     ^
/usr/include/c++/4.8/bits/istream.tcc:923:5: note:   template argument deduction/substitution failed:
coada2.cpp:11:21: note:   'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<_CharT, _Traits>'
     else {fout>>y+z-x;}

                     ^
In file included from /usr/include/c++/4.8/iostream:40:0,
                 from coada2.cpp:1:
/usr/include/c++/4.8/istream:727:5: note: template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(std::basic_istream<char, _Traits>&, unsigned char&)
     operator>>(basic_istream<char, _Traits>& __in, unsigned char& __c)
     ^
/usr/include/c++/4.8/istream:727:5: note:   template argument deduction/substitution failed:
coada2.cpp:11:21: note:   'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<char, _Traits>'
     else {fout>>y+z-x;}

                     ^
In file included from /usr/include/c++/4.8/iostream:40:0,
                 from coada2.cpp:1:
/usr/include/c++/4.8/istream:732:5: note: template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(std::basic_istream<char, _Traits>&, signed char&)
     operator>>(basic_istream<char, _Traits>& __in, signed char& __c)
     ^
/usr/include/c++/4.8/istream:732:5: note:   template argument deduction/substitution failed:
coada2.cpp:11:21: note:   'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<char, _Traits>'
     else {fout>>y+z-x;}

                     ^
In file included from /usr/include/c++/4.8/iostream:40:0,
                 from coada2.cpp:1:
/usr/include/c++/4.8/istream:774:5: note: template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(std::basic_istream<char, _Traits>&, unsigned char*)
     operator>>(basic_istream<char, _Traits>& __in, unsigned char* __s)
     ^
/usr/include/c++/4.8/istream:774:5: note:   template argument deduction/substitution failed:
coada2.cpp:11:21: note:   'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<char, _Traits>'
     else {fout>>y+z-x;}

                     ^
In file included from /usr/include/c++/4.8/iostream:40:0,
                 from coada2.cpp:1:
/usr/include/c++/4.8/istream:779:5: note: template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(std::basic_istream<char, _Traits>&, signed char*)
     operator>>(basic_istream<char, _Traits>& __in, signed char* __s)
     ^
/usr/include/c++/4.8/istream:779:5: note:   template argument deduction/substitution failed:
coada2.cpp:11:21: note:   'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<char, _Traits>'
     else {fout>>y+z-x;}

                     ^
In file included from /usr/include/c++/4.8/iostream:40:0,
                 from coada2.cpp:1:
/usr/include/c++/4.8/istream:872:5: note: template<class _CharT, class _Traits, class _Tp> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&&, _Tp&)
     operator>>(basic_istream<_CharT, _Traits>&& __is, _Tp& __x)
     ^
/usr/include/c++/4.8/istream:872:5: note:   template argument deduction/substitution failed:
coada2.cpp:11:21: note:   'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<_CharT, _Traits>'
     else {fout>>y+z-x;}

                     ^
coada2.cpp:11:20: warning: suggest parentheses around '-' inside '>>' [-Wparentheses]
     else {fout>>y+z-x;}

                    ^

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 Coada2 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.