Compilare: main.cpp: In function 'void build(long long int, long long int, long long int)': main.cpp:31:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while( (p1<t[2*v].size()) && (p2<t[2*v+1].size()) ){ ~~^~~~~~~~~~~~~~ main.cpp:31:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while( (p1<t[2*v].size()) && (p2<t[2*v+1].size()) ){ ~~^~~~~~~~~~~~~~~~ main.cpp:32:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p1==t[2*v].size()){ ~~^~~~~~~~~~~~~~~ main.cpp:37:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p2==t[2*v+1].size()){ ~~^~~~~~~~~~~~~~~~~