Compilare: main.cpp: In function 'void build_merge_tree(int, int, int)': main.cpp:49:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 49 | while(i<V[2*node].size() && j<V[2*node+1].size()){ | ~^~~~~~~~~~~~~~~~~ main.cpp:49:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 49 | while(i<V[2*node].size() && j<V[2*node+1].size()){ | ~^~~~~~~~~~~~~~~~~~~ main.cpp:55:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 55 | while(i<V[2*node].size()) | ~^~~~~~~~~~~~~~~~~ main.cpp:57:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | while(j<V[2*node+1].size()) | ~^~~~~~~~~~~~~~~~~~~ main.cpp:61:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | for(i=1;i<V[node].size();++i) | ~^~~~~~~~~~~~~~~