Rezumat problemă

plusminus

#1357

Fie n un număr natural.
Să se determine toate posibilitățile de alegere a semnelor + și - pentru care
n = (+|-) 12 + (+|-) 22 + ... + (+|-) n2

Fișiere Minca Carmen (carmen) Carmen Minca ușoară

Clasa 11 Backtracking Probleme diverse

Rezolvă

Detalii

Problema	plusminus	Operații I/O	plusminus.in/plusminus.out
Limita timp	0.2 secunde	Limita memorie	Total: 2 MB / Stivă 2 MB
Id soluție	#64664037	Utilizator	Mut Filip (Mut_Filip)
Fișier	plusminus.cpp	Dimensiune	660 B
Data încărcării	21 Mai 2026, 10:53	Scor/rezultat	Eroare de compilare

Evaluare

Mesaj compilare

plusminus.cpp:19:46: warning: missing terminating " character
   19 |                                 else cout << "+
      |                                              ^
plusminus.cpp:19:46: error: missing terminating " character
   19 |                                 else cout << "+
      |                                              ^~
plusminus.cpp:4:31: error: expected unqualified-id before ‘,’ token
    4 |  ifstream cin("plusminus.in");,
      |                               ^
plusminus.cpp:7:11: error: expected constructor, destructor, or type conversion before ‘cout’
    7 |  ofstream cout("plusminus.out");
      |           ^~~~
plusminus.cpp: In function ‘void backt(int, int)’:
plusminus.cpp:13:12: error: ‘in’ was not declared in this scope; did you mean ‘i’?
   13 |         if(in)
      |            ^~
      |            i
plusminus.cpp:18:47: error: ‘cout’ was not declared in this scope
   18 |                                 if(s[j] == 0) cout << " ";
      |                                               ^~~~
plusminus.cpp:2:1: note: ‘std::cout’ is defined in header ‘<iostream>’; did you forget to ‘#include <iostream>’?
    1 | #include <fstream>
  +++ |+#include <iostream>
    2 |  using namespace std;
plusminus.cpp:19:38: error: ‘cout’ was not declared in this scope
   19 |                                 else cout << "+
      |                                      ^~~~
plusminus.cpp:19:38: note: ‘std::cout’ is defined in header ‘<iostream>’; did you forget to ‘#include <iostream>’?
plusminus.cpp: In function ‘int main()’:
plusminus.cpp:37:9: error: ‘cout’ was not declared in this scope
   37 |         cout<<"IMPOSIBIL";
      |         ^~~~
plusminus.cpp:37:9: note: ‘std::cout’ is defined in header ‘<iostream>’; did you forget to ‘#include <iostream>’?

Cum funcționează evaluarea?