Rezumat problemă

Deceneu

#4979

Deceneu știa matematică, așa că vă arată un număr natural n. Trebuie să răspundeți la două întrebări simple și primiți o vizită la peștera sacră a dacilor, Kogaionon:
1. Care este prima cifră a lui n?
2. Cu câte zerouri se termină numărul n!, unde prin n! se înțelege produsul 1*2*3*...*n

OJI 2026, clasa a 6-a, antrenament

Fișiere Pracsiu Dan (dnprx) Pracsiu Dan concurs

Clasa 9 Algoritmi elementari Divizibilitate

Rezolvă

Detalii

Problema	Deceneu	Operații I/O	deceneu.in/deceneu.out
Limita timp	0.2 secunde	Limita memorie	Total: 64 MB / Stivă 8 MB
Id soluție	#63863871	Utilizator	Carbunaru Armand (armandpavel2008)
Fișier	deceneu.cpp	Dimensiune	236 B
Data încărcării	23 Martie 2026, 14:33	Scor/rezultat	Eroare de compilare

Evaluare

Mesaj compilare

deceneu.cpp: In function 'int main()':
deceneu.cpp:17:7: error: no match for 'operator>>' (operand types are 'std::ofstream {aka std::basic_ofstream<char>}' and 'long long int')
    out>>n;

       ^
deceneu.cpp:17:7: 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/istream:38,
                 from /usr/include/c++/4.8/fstream:38,
                 from deceneu.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:
deceneu.cpp:17:9: note:   'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<_CharT, _Traits>'
    out>>n;

         ^
In file included from /usr/include/c++/4.8/istream:882:0,
                 from /usr/include/c++/4.8/fstream:38,
                 from deceneu.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:
deceneu.cpp:17:9: note:   'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<_CharT, _Traits>'
    out>>n;

         ^
In file included from /usr/include/c++/4.8/istream:882:0,
                 from /usr/include/c++/4.8/fstream:38,
                 from deceneu.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:
deceneu.cpp:17:9: note:   'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<_CharT, _Traits>'
    out>>n;

         ^
In file included from /usr/include/c++/4.8/fstream:38:0,
                 from deceneu.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:
deceneu.cpp:17:9: note:   'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<char, _Traits>'
    out>>n;

         ^
In file included from /usr/include/c++/4.8/fstream:38:0,
                 from deceneu.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:
deceneu.cpp:17:9: note:   'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<char, _Traits>'
    out>>n;

         ^
In file included from /usr/include/c++/4.8/fstream:38:0,
                 from deceneu.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:
deceneu.cpp:17:9: note:   'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<char, _Traits>'
    out>>n;

         ^
In file included from /usr/include/c++/4.8/fstream:38:0,
                 from deceneu.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:
deceneu.cpp:17:9: note:   'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<char, _Traits>'
    out>>n;

         ^
In file included from /usr/include/c++/4.8/fstream:38:0,
                 from deceneu.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:
deceneu.cpp:17:9: note:   'std::ofstream {aka std::basic_ofstream<char>}' is not derived from 'std::basic_istream<_CharT, _Traits>'
    out>>n;

         ^
deceneu.cpp:9:16: warning: unused variable 'x' [-Wunused-variable]
    long long n,x,C;

                ^

Cum funcționează evaluarea?