Compilare: main.cpp: In function 'void build(int, int, int)': main.cpp:33:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | while (i < tree[nod*2].v.size() && j < tree[nod*2+1].v.size()) | ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:33:42: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | while (i < tree[nod*2].v.size() && j < tree[nod*2+1].v.size()) | ~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:47:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 47 | while (i < tree[nod*2].v.size()) | ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:49:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 49 | while (j < tree[nod*2+1].v.size()) | ~~^~~~~~~~~~~~~~~~~~~~~~~~