Compilare: main.cpp: In function 'void build2(int, int, int, int, int)': main.cpp:18:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(pa < aint[org][nod << 1].size() && pb < aint[org][nod << 1|1].size()) ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:18:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(pa < aint[org][nod << 1].size() && pb < aint[org][nod << 1|1].size()) ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:25:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(pa < aint[org][nod << 1].size()) ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:27:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(pb < aint[org][nod << 1|1].size()) ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void build(int, int, int)': main.cpp:43:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(pa < aint[nod << 1][j].size() && pb < aint[nod << 1|1][j].size()) ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:43:51: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(pa < aint[nod << 1][j].size() && pb < aint[nod << 1|1][j].size()) ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:50:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(pa < aint[nod << 1][j].size()) ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:52:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(pb < aint[nod << 1|1][j].size()) ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~