Compilare: user.cpp: In function ‘bool comp(std::pair<double, double>, std::pair<double, double>)’: user.cpp:36:8: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if ( cmp1 == cmp2 ) ^ user.cpp: In function ‘int main()’: user.cpp:73:38: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 2 has type ‘std::vector<std::pair<double, double> >::size_type {aka unsigned int}’ [-Wformat=] printf ( "%ld\n", queue.size ( ) ); ^