Compilare: main.cpp: In function 'int main()': main.cpp:61:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | for ( int j = 0 ; j < graf[ nod ].size() ; j ++ ) | ~~^~~~~~~~~~~~~~~~~~~~ main.cpp:99:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 99 | for ( int i = 0 ; i < ubunt [ b ] .size() ; i ++ ) | ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:94:19: warning: unused variable 'a' [-Wunused-variable] 94 | long long a = pq.front().first; | ^