Compilare: main.cpp: In function 'void build(int, int, int)': main.cpp:35:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ind1<tree[2*nod].size() and ind2<tree[2*nod+1].size()) ~~~~^~~~~~~~~~~~~~~~~~~ main.cpp:35:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ind1<tree[2*nod].size() and ind2<tree[2*nod+1].size()) ~~~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:41:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ind1<tree[2*nod].size()) ~~~~^~~~~~~~~~~~~~~~~~~ main.cpp:43:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ind2<tree[2*nod+1].size()) ~~~~^~~~~~~~~~~~~~~~~~~~~