Compilare: main.cpp: In function 'void sortare_preturi(pret*)': main.cpp:41:9: warning: unused variable 'i' [-Wunused-variable] int i,j; ^ main.cpp: In function 'void print()': main.cpp:57:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<g[i].size();j++) ~^~~~~~~~~~~~ main.cpp: In function 'void sol()': main.cpp:76:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0;k<g[j].size();k++) ~^~~~~~~~~~~~