Compilare: main.cpp:18:24: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] 18 | const int oo = 1 << 31 - 1; | ~~~^~~ main.cpp: In function 'void dijkstra()': main.cpp:57:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | for( int i = 0; i < a[nod].size(); ++i ) | ~~^~~~~~~~~~~~~~~ main.cpp:55:13: warning: unused variable 'c' [-Wunused-variable] 55 | int c = heap.top().first; | ^