Compilare: main.cpp: In function 'bool min_vecin(int, int)': main.cpp:38:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | for ( int a = 0; a < vecini.size(); a++ ) | ~~^~~~~~~~~~~~~~~ main.cpp:39:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | for ( int b = 0; b < vecini.size(); b++ ) | ~~^~~~~~~~~~~~~~~