Compilare: main.cpp: In function 'void build(int, int, int)': main.cpp:53:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 53 | while (i<A[2*nod].size() && j<A[2*nod+1].size()) | ~^~~~~~~~~~~~~~~~ main.cpp:53:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 53 | while (i<A[2*nod].size() && j<A[2*nod+1].size()) | ~^~~~~~~~~~~~~~~~~~ main.cpp:67:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 67 | while (i<A[2*nod].size()) | ~^~~~~~~~~~~~~~~~ main.cpp:73:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 73 | while (j<A[2*nod+1].size()) | ~^~~~~~~~~~~~~~~~~~