Compilare: user.cpp: In function ‘void citire()’: user.cpp:18:21: warning: unused variable ‘r’ [-Wunused-variable] int a=0,b=0,u=0,r=0; ^ user.cpp: In function ‘void pornesc(int)’: user.cpp:47:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<l[k].size();i++) ^ user.cpp:48:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(w[k]+l[k][i].c<=n||p[k]==1) ^ user.cpp: In function ‘void bfs2(int)’: user.cpp:86:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<l[k].size();i++) ^