Compilare: main.cpp: In function 'void build(int, int, int)': main.cpp:34:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | while(i < (*left).size() and j < (*right).size()){ | ~~^~~~~~~~~~~~~~~~ main.cpp:34:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | while(i < (*left).size() and j < (*right).size()){ | ~~^~~~~~~~~~~~~~~~~ main.cpp:41:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | while(i < (*left).size()) | ~~^~~~~~~~~~~~~~~~ main.cpp:44:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | while(j < (*right).size()) | ~~^~~~~~~~~~~~~~~~~