Compilare: main.cpp: In function 'void AINT::b(int, int, int)': main.cpp:72:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 72 | while(a < V[u*2].size() && b < V[u*2+1].size()) { | ~~^~~~~~~~~~~~~~~ main.cpp:72:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 72 | while(a < V[u*2].size() && b < V[u*2+1].size()) { | ~~^~~~~~~~~~~~~~~~~ main.cpp:76:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 76 | while(a < V[u*2].size()) V[u].push_back(V[u*2][a++]); | ~~^~~~~~~~~~~~~~~ main.cpp:77:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 77 | while(b < V[u*2+1].size()) V[u].push_back(V[u*2+1][b++]); | ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'void AINT::b2(int, int, int)': main.cpp:83:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 83 | for(int i = 1; i < V[u].size(); ++i) V[u][i] += V[u][i-1]; | ~~^~~~~~~~~~~~~