Compilare: main.cpp: In function 'void bkt(int, long long int, int)': main.cpp:144:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 144 | for (int i = 0; i < aaa.size(); i++) { | ~~^~~~~~~~~~~~ main.cpp:152:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 152 | for (int i = last + 1; i < aaa.size(); i++) { | ~~^~~~~~~~~~~~