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Detalii evaluare #64483544

Rezumat problemă

CountSumS
C++
#3941

Scrieți funcția care are antetul:

long long CountSumS(vector<int> &a, int s)

Funcția va returna numărul de perechi (a[i], a[j]) cu i < j și a[i] + a[j] = s.

Folclorul informatic
Fișiere Pracsiu Dan (dnprx) Dan Pracsiu medie
Clasa 10 Subprograme STL Hash
Rezolvă

Detalii

Problema CountSumS Operații I/O countsums.in/countsums.out
Limita timp 0.4 secunde Limita memorie Total: 128 MB / Stivă 64 MB
Id soluție #64483544 Utilizator Prodan Radu (Prodan_radu)
Fișier countsums.cpp Dimensiune 774 B
Data încărcării 10 Mai 2026, 13:11 Scor/rezultat Eroare de compilare

Evaluare

Mesaj compilare

countsums.cpp: In function ‘long long int CountSumS(std::vector<int>&, int)’:
countsums.cpp:6:29: error: expected initializer before ‘-’ token
    6 |         int n=a.size(), left-0, right=a.size()-1;
      |                             ^
countsums.cpp:10:36: error: invalid conversion from ‘std::ios_base& (*)(std::ios_base&)’ to ‘std::vector<int>::size_type’ {aka ‘long unsigned int’} [-fpermissive]
   10 |         long long sum=(long long)b[left]+b[right];
      |                                    ^~~~
      |                                    |
      |                                    std::ios_base& (*)(std::ios_base&)
In file included from /usr/include/c++/13/vector:66,
                 from /usr/include/c++/13/queue:63,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:157,
                 from countsums.cpp:1:
/usr/include/c++/13/bits/stl_vector.h:1126:28: note:   initializing argument 1 of ‘std::vector<_Tp, _Alloc>::reference std::vector<_Tp, _Alloc>::operator[](size_type) [with _Tp = int; _Alloc = std::allocator<int>; reference = int&; size_type = long unsigned int]’
 1126 |       operator[](size_type __n) _GLIBCXX_NOEXCEPT
      |                  ~~~~~~~~~~^~~
countsums.cpp:10:44: error: invalid conversion from ‘std::ios_base& (*)(std::ios_base&)’ to ‘std::vector<int>::size_type’ {aka ‘long unsigned int’} [-fpermissive]
   10 |         long long sum=(long long)b[left]+b[right];
      |                                            ^~~~~
      |                                            |
      |                                            std::ios_base& (*)(std::ios_base&)
/usr/include/c++/13/bits/stl_vector.h:1126:28: note:   initializing argument 1 of ‘std::vector<_Tp, _Alloc>::reference std::vector<_Tp, _Alloc>::operator[](size_type) [with _Tp = int; _Alloc = std::allocator<int>; reference = int&; size_type = long unsigned int]’
 1126 |       operator[](size_type __n) _GLIBCXX_NOEXCEPT
      |                  ~~~~~~~~~~^~~
countsums.cpp:11:15: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   11 |         if(sum=s){
      |            ~~~^~
countsums.cpp:12:18: error: invalid conversion from ‘std::ios_base& (*)(std::ios_base&)’ to ‘std::vector<int>::size_type’ {aka ‘long unsigned int’} [-fpermissive]
   12 |             if(b[left]==b[right]){
      |                  ^~~~
      |                  |
      |                  std::ios_base& (*)(std::ios_base&)
/usr/include/c++/13/bits/stl_vector.h:1126:28: note:   initializing argument 1 of ‘std::vector<_Tp, _Alloc>::reference std::vector<_Tp, _Alloc>::operator[](size_type) [with _Tp = int; _Alloc = std::allocator<int>; reference = int&; size_type = long unsigned int]’
 1126 |       operator[](size_type __n) _GLIBCXX_NOEXCEPT
      |                  ~~~~~~~~~~^~~
countsums.cpp:12:27: error: invalid conversion from ‘std::ios_base& (*)(std::ios_base&)’ to ‘std::vector<int>::size_type’ {aka ‘long unsigned int’} [-fpermissive]
   12 |             if(b[left]==b[right]){
      |                           ^~~~~
      |                           |
      |                           std::ios_base& (*)(std::ios_base&)
/usr/include/c++/13/bits/stl_vector.h:1126:28: note:   initializing argument 1 of ‘std::vector<_Tp, _Alloc>::reference std::vector<_Tp, _Alloc>::operator[](size_type) [with _Tp = int; _Alloc = std::allocator<int>; reference = int&; size_type = long unsigned int]’
 1126 |       operator[](size_type __n) _GLIBCXX_NOEXCEPT
      |                  ~~~~~~~~~~^~~
countsums.cpp:13:34: error: ISO C++ forbids using pointer to a function in subtraction [-fpermissive]
   13 |                 long long r=right-left+1;
      |                             ~~~~~^~~~~
countsums.cpp:18:23: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   18 |             while(left+1<right && b[left]==b[left+1]){left++; lcnt++;}
      |                   ~~~~^~
countsums.cpp:18:37: error: invalid conversion from ‘std::ios_base& (*)(std::ios_base&)’ to ‘std::vector<int>::size_type’ {aka ‘long unsigned int’} [-fpermissive]
   18 |             while(left+1<right && b[left]==b[left+1]){left++; lcnt++;}
      |                                     ^~~~
      |                                     |
      |                                     std::ios_base& (*)(std::ios_base&)
/usr/include/c++/13/bits/stl_vector.h:1126:28: note:   initializing argument 1 of ‘std::vector<_Tp, _Alloc>::reference std::vector<_Tp, _Alloc>::operator[](size_type) [with _Tp = int; _Alloc = std::allocator<int>; reference = int&; size_type = long unsigned int]’
 1126 |       operator[](size_type __n) _GLIBCXX_NOEXCEPT
      |                  ~~~~~~~~~~^~~
countsums.cpp:18:50: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   18 |             while(left+1<right && b[left]==b[left+1]){left++; lcnt++;}
      |                                              ~~~~^~
countsums.cpp:18:50: error: invalid conversion from ‘std::ios_base& (*)(std::ios_base&)’ to ‘std::vector<int>::size_type’ {aka ‘long unsigned int’} [-fpermissive]
   18 |             while(left+1<right && b[left]==b[left+1]){left++; lcnt++;}
      |                                              ~~~~^~
      |                                                  |
      |                                                  std::ios_base& (*)(std::ios_base&)
/usr/include/c++/13/bits/stl_vector.h:1126:28: note:   initializing argument 1 of ‘std::vector<_Tp, _Alloc>::reference std::vector<_Tp, _Alloc>::operator[](size_type) [with _Tp = int; _Alloc = std::allocator<int>; reference = int&; size_type = long unsigned int]’
 1126 |       operator[](size_type __n) _GLIBCXX_NOEXCEPT
      |                  ~~~~~~~~~~^~~
countsums.cpp:18:55: warning: ISO C++ forbids incrementing a pointer of type ‘std::ios_base& (*)(std::ios_base&)’ [-Wpointer-arith]
   18 |             while(left+1<right && b[left]==b[left+1]){left++; lcnt++;}
      |                                                       ^~~~
countsums.cpp:18:55: error: lvalue required as increment operand
countsums.cpp:19:24: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   19 |             while(right-1>left && b[right]==b[right-1]){right--; rnct++;}
      |                   ~~~~~^~
countsums.cpp:19:37: error: invalid conversion from ‘std::ios_base& (*)(std::ios_base&)’ to ‘std::vector<int>::size_type’ {aka ‘long unsigned int’} [-fpermissive]
   19 |             while(right-1>left && b[right]==b[right-1]){right--; rnct++;}
      |                                     ^~~~~
      |                                     |
      |                                     std::ios_base& (*)(std::ios_base&)
/usr/include/c++/13/bits/stl_vector.h:1126:28: note:   initializing argument 1 of ‘std::vector<_Tp, _Alloc>::reference std::vector<_Tp, _Alloc>::operator[](size_type) [with _Tp = int; _Alloc = std::allocator<int>; reference = int&; size_type = long unsigned int]’
 1126 |       operator[](size_type __n) _GLIBCXX_NOEXCEPT
      |                  ~~~~~~~~~~^~~
countsums.cpp:19:52: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   19 |             while(right-1>left && b[right]==b[right-1]){right--; rnct++;}
      |                                               ~~~~~^~
countsums.cpp:19:52: error: invalid conversion from ‘std::ios_base& (*)(std::ios_base&)’ to ‘std::vector<int>::size_type’ {aka ‘long unsigned int’} [-fpermissive]
   19 |             while(right-1>left && b[right]==b[right-1]){right--; rnct++;}
      |                                               ~~~~~^~
      |                                                    |
      |                                                    std::ios_base& (*)(std::ios_base&)
/usr/include/c++/13/bits/stl_vector.h:1126:28: note:   initializing argument 1 of ‘std::vector<_Tp, _Alloc>::reference std::vector<_Tp, _Alloc>::operator[](size_type) [with _Tp = int; _Alloc = std::allocator<int>; reference = int&; size_type = long unsigned int]’
 1126 |       operator[](size_type __n) _GLIBCXX_NOEXCEPT
      |                  ~~~~~~~~~~^~~
countsums.cpp:19:57: warning: ISO C++ forbids decrementing a pointer of type ‘std::ios_base& (*)(std::ios_base&)’ [-Wpointer-arith]
   19 |             while(right-1>left && b[right]==b[right-1]){right--; rnct++;}
      |                                                         ^~~~~
countsums.cpp:19:57: error: lvalue required as decrement operand
countsums.cpp:19:66: error: ‘rnct’ was not declared in this scope; did you mean ‘rcnt’?
   19 |             while(right-1>left && b[right]==b[right-1]){right--; rnct++;}
      |                                                                  ^~~~
      |                                                                  rcnt
countsums.cpp:21:13: warning: ISO C++ forbids incrementing a pointer of type ‘std::ios_base& (*)(std::ios_base&)’ [-Wpointer-arith]
   21 |             left++;
      |             ^~~~
countsums.cpp:21:13: error: lvalue required as increment operand
countsums.cpp:22:13: warning: ISO C++ forbids decrementing a pointer of type ‘std::ios_base& (*)(std::ios_base&)’ [-Wpointer-arith]
   22 |             right--;
      |             ^~~~~
countsums.cpp:22:13: error: lvalue required as decrement operand
countsums.cpp:24:23: warning: ISO C++ forbids incrementing a pointer of type ‘std::ios_base& (*)(std::ios_base&)’ [-Wpointer-arith]
   24 |         else if(sum<s)left++;
      |                       ^~~~
countsums.cpp:24:23: error: lvalue required as increment operand
countsums.cpp:25:14: warning: ISO C++ forbids decrementing a pointer of type ‘std::ios_base& (*)(std::ios_base&)’ [-Wpointer-arith]
   25 |         else right--;
      |              ^~~~~
countsums.cpp:25:14: error: lvalue required as decrement operand
countsums.cpp:6:13: warning: unused variable ‘n’ [-Wunused-variable]
    6 |         int n=a.size(), left-0, right=a.size()-1;
      |             ^

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 CountSumS face parte din a doua categorie. Pentru aceste probleme se folosește un program suport, furnizat de propunătorul problemei. Soluția propusă de tine va fi evaluată astfel:

  • Soluția propusă de tine este inclusă în programul suport, apoi acesta este compilat. Dacă în urma compilării se obțin erori sau avertismente, acestea sunt afișate în această pagină.
  • Datorită existenței programului suport, la compilare pot să apară erori sau avertismente care să nu se refere la instrucțiunile scrise de tine, dar care sunt datorate faptului că soluția ta nu este corectă.
  • Dacă programul suport 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.

Du-te sus!