Compilare: main.cpp: In function 'void AINT::b(int, int, int)': main.cpp:20:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | while(a < V[u*2].size() && b < V[u*2+1].size()) { | ~~^~~~~~~~~~~~~~~ main.cpp:20:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | while(a < V[u*2].size() && b < V[u*2+1].size()) { | ~~^~~~~~~~~~~~~~~~~ main.cpp:24:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | while(a < V[u*2].size()) V[u].push_back(V[u*2][a++]); | ~~^~~~~~~~~~~~~~~ main.cpp:25:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | while(b < V[u*2+1].size()) V[u].push_back(V[u*2+1][b++]); | ~~^~~~~~~~~~~~~~~~~