Rezumat problemă

prosum

#3775

Se dau N numere naturale a[1], a[2], ..., a[N] şi un număr natural nenul M. Să se determine numărul perechilor de indici (i, j), cu i < j, cu proprietatea că numărul a[i]*a[j]+a[i]+a[j] este divizibil cu M.

Lot informatică 2021

Fișiere Pracsiu Dan (dnprx) Mihai Bunget concurs

Clasa 9 Tablouri unidimensionale (vectori) Căutare binară Cmmdc Invers modular Cautare binara set Map

Rezolvă

Detalii

Problema	prosum	Operații I/O	prosum.in/prosum.out
Limita timp	0.7 secunde	Limita memorie	Total: 64 MB / Stivă 8 MB
Id soluție	#63366183	Utilizator	fulg Nea (fulg)
Fișier	prosum.cpp	Dimensiune	1.43 KB
Data încărcării	28 Februarie 2026, 10:01	Scor/rezultat	Eroare de compilare

Evaluare

Mesaj compilare

prosum.cpp: In function 'long long int inv_mod(long long int, long long int)':
prosum.cpp:25:15: warning: unused variable 'g' [-Wunused-variable]
     long long g = ext_gcd(a, mod, x, y); // aici g va fi 1

               ^
prosum.cpp: In function 'int main()':
prosum.cpp:45:5: error: reference to 'cin' is ambiguous
     cin.tie(nullptr);

     ^
prosum.cpp:4:10: note: candidates are: std::ifstream cin
 ifstream cin("prosum.in");

          ^
In file included from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:74:0,
                 from prosum.cpp:1:
/usr/include/c++/4.8/iostream:60:18: note:                 std::istream std::cin
   extern istream cin;  /// Linked to standard input
                  ^
prosum.cpp:49:5: error: reference to 'cin' is ambiguous
     cin >> n >> m;

     ^
prosum.cpp:4:10: note: candidates are: std::ifstream cin
 ifstream cin("prosum.in");

          ^
In file included from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:74:0,
                 from prosum.cpp:1:
/usr/include/c++/4.8/iostream:60:18: note:                 std::istream std::cin
   extern istream cin;  /// Linked to standard input
                  ^
prosum.cpp:60:9: error: reference to 'cin' is ambiguous
         cin >> a;

         ^
prosum.cpp:4:10: note: candidates are: std::ifstream cin
 ifstream cin("prosum.in");

          ^
In file included from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:74:0,
                 from prosum.cpp:1:
/usr/include/c++/4.8/iostream:60:18: note:                 std::istream std::cin
   extern istream cin;  /// Linked to standard input
                  ^
prosum.cpp:76:5: error: reference to 'cout' is ambiguous
     cout << ans;

     ^
prosum.cpp:5:10: note: candidates are: std::ofstream cout
 ofstream cout("prosum.out");

          ^
In file included from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:74:0,
                 from prosum.cpp:1:
/usr/include/c++/4.8/iostream:61:18: note:                 std::ostream std::cout
   extern ostream cout;  /// Linked to standard output
                  ^

Cum funcționează evaluarea?