Compilare: user.cpp: In function ‘bool dijkstra(int)’: user.cpp:45:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < e[nod].size(); i++) { ^ user.cpp:32:9: warning: variable ‘c’ set but not used [-Wunused-but-set-variable] int c; ^ user.cpp: In function ‘bool bellman()’: user.cpp:92:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < e[nod].size(); i++) { ^ user.cpp:111:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < e[i].size(); j++) { ^