Compilare: user.cpp: In member function ‘void heap::pop()’: user.cpp:37:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ( sn < v.size() && v[n] < v[sn] ^ user.cpp:38:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] || sn + 1 < v.size() && v[n] < v[sn + 1] ) { ^ user.cpp:37:27: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] while ( sn < v.size() && v[n] < v[sn] ^ user.cpp:40:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if( sn + 1 == v.size() ) { ^ user.cpp: In function ‘int main()’: user.cpp:64:22: warning: unused variable ‘nr’ [-Wunused-variable] int n, hp, k, i, nr; ^