Rezumat problemă

Necuatie

#1160

Se dă n un număr natural nenul. Să se afle câte soluții are ecuația x1+x2+...+xn=0 în mulțimea {-1,0,1}.

Fișiere Bunget Mihai (mihaibun) Mihai Bunget medie

Clasa 10 Probleme diverse Combinatorică

Rezolvă

Detalii

Problema	Necuatie	Operații I/O	necuatie.in/necuatie.out
Limita timp	0.1 secunde	Limita memorie	Total: 64 MB / Stivă 8 MB
Id soluție	#56825233	Utilizator	Marinescu Calin (hihi)
Fișier	necuatie.cpp	Dimensiune	881 B
Data încărcării	06 Martie 2025, 22:38	Scor / rezultat	Eroare de compilare

Evaluare

Mesaj compilare

necuatie.cpp:5:13: error: variable 'std::ifstream fin' has initializer but incomplete type
 ifstream fin("necuatie.in");

             ^
necuatie.cpp:6:14: error: variable 'std::ofstream fout' has initializer but incomplete type
 ofstream fout("necuatie.out")

              ^
necuatie.cpp:7:1: error: expected ',' or ';' before 'const'
 const int MOD=555557;

 ^
necuatie.cpp: In function 'void factorial()':
necuatie.cpp:14:29: error: 'MOD' was not declared in this scope
         fact[i]=fact[i-1]*i%MOD;

                             ^
necuatie.cpp: In function 'long long int power(long long int, long long int)':
necuatie.cpp:23:21: error: 'MOD' was not declared in this scope
             p=(p*a)%MOD;

                     ^
necuatie.cpp:24:15: error: 'MOD' was not declared in this scope
         a=a*a%MOD;

               ^
necuatie.cpp: In function 'long long int combinari(int, int)':
necuatie.cpp:35:25: error: 'MOD' was not declared in this scope
     return 1LL*(fact[n]%MOD*power(fact[n-k],MOD-2)%MOD*power(fact[k],MOD-2)%MOD)%MOD;

                         ^
necuatie.cpp: In function 'int main()':
necuatie.cpp:45:58: error: 'MOD' was not declared in this scope
         result=result+(combinari(2*i,n)*combinari(i,2*i)%MOD)%MOD;

                                                          ^
necuatie.cpp: In function 'long long int combinari(int, int)':
necuatie.cpp:36:1: warning: control reaches end of non-void function [-Wreturn-type]
 }

 ^

Cum funcționează evaluarea?