Compilare: main.cpp: In function 'int main()': main.cpp:46:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<cue>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for ( int i = 0; i < a[current.x].size(); i ++ ) | ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:51:72: warning: narrowing conversion of 'c[a[current.cue::x].std::vector<cue>::operator[](((std::vector<cue>::size_type)i)).cue::x]' from 'long long int' to 'int' [-Wnarrowing] 51 | pq.push( { a[current.x][i].x, c[ a[current.x][i].x ] } ); | ~~~~~~~~~~~~~~~~~~~~~^