Rezumat problemă

Prim

#590

Se dă un graf neorientat ponderat conex cu n vârfuri și m muchii – în care fiecare muchie are asociat un cost, număr natural strict pozitiv. Folosind algoritmul lui Prim, determinați un arbore parțial de cost minim, cu rădăcina în vârful 1.

Fișiere Candale Silviu (silviu) ușoară

Clasa 11 Teoria Grafurilor Grafuri cu costuri Algoritmul lui Prim

Rezolvă

Detalii

Problema	Prim	Operații I/O	prim.in/prim.out
Limita timp	0.1 secunde	Limita memorie	Total: 64 MB / Stivă 8 MB
Id soluție	#57777460	Utilizator	The Silentbit (bonta_patric)
Fișier	prim.cpp	Dimensiune	4.07 KB
Data încărcării	15 Aprilie 2025, 18:19	Scor / rezultat	Eroare de compilare

Evaluare

Mesaj compilare

prim.cpp: In function 'int prim_mst()':
prim.cpp:198:18: error: converting to 'std::priority_queue<std::tuple<int, int, int>, std::vector<std::tuple<int, int, int> >, std::greater<std::tuple<int, int, int> > >::value_type {aka std::tuple<int, int, int>}' from initializer list would use explicit constructor 'constexpr std::tuple< <template-parameter-1-1> >::tuple(_UElements&& ...) [with _UElements = {int, int, int}; <template-parameter-2-2> = void; _Elements = {int, int, int}]'
  Q.push({0, 1, 0}); // weight, node

                  ^
prim.cpp:201:8: error: expected unqualified-id before '[' token
   auto [weight, to, from] = Q.top();

        ^
prim.cpp:205:14: error: 'to' was not declared in this scope
   if(visited[to]) {

              ^
prim.cpp:209:10: error: 'weight' was not declared in this scope
   rez += weight;

          ^
prim.cpp:210:11: error: 'to' was not declared in this scope
   visited[to] = 1;

           ^
prim.cpp:211:20: error: 'from' was not declared in this scope
   mstparents[to] = from;

                    ^
prim.cpp:215:35: error: no matching function for call to 'std::priority_queue<std::tuple<int, int, int>, std::vector<std::tuple<int, int, int> >, std::greater<std::tuple<int, int, int> > >::push(<brace-enclosed initializer list>)'
     Q.push({x.second, x.first, to});

                                   ^
prim.cpp:215:35: note: candidates are:
In file included from /usr/include/c++/4.8/queue:64:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:85,
                 from prim.cpp:1:
/usr/include/c++/4.8/bits/stl_queue.h:496:7: note: void std::priority_queue<_Tp, _Sequence, _Compare>::push(const value_type&) [with _Tp = std::tuple<int, int, int>; _Sequence = std::vector<std::tuple<int, int, int> >; _Compare = std::greater<std::tuple<int, int, int> >; std::priority_queue<_Tp, _Sequence, _Compare>::value_type = std::tuple<int, int, int>]
       push(const value_type& __x)
       ^
/usr/include/c++/4.8/bits/stl_queue.h:496:7: note:   no known conversion for argument 1 from '<brace-enclosed initializer list>' to 'const value_type& {aka const std::tuple<int, int, int>&}'
/usr/include/c++/4.8/bits/stl_queue.h:504:7: note: void std::priority_queue<_Tp, _Sequence, _Compare>::push(std::priority_queue<_Tp, _Sequence, _Compare>::value_type&&) [with _Tp = std::tuple<int, int, int>; _Sequence = std::vector<std::tuple<int, int, int> >; _Compare = std::greater<std::tuple<int, int, int> >; std::priority_queue<_Tp, _Sequence, _Compare>::value_type = std::tuple<int, int, int>]
       push(value_type&& __x)
       ^
/usr/include/c++/4.8/bits/stl_queue.h:504:7: note:   no known conversion for argument 1 from '<brace-enclosed initializer list>' to 'std::priority_queue<std::tuple<int, int, int>, std::vector<std::tuple<int, int, int> >, std::greater<std::tuple<int, int, int> > >::value_type&& {aka std::tuple<int, int, int>&&}'

Cum funcționează evaluarea?