Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:25:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<lista[nod].size(); i++) ^ user.cpp: In function ‘void dfs2(int)’: user.cpp:35:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<lista[nod].size(); i++) ^ user.cpp: In function ‘void realizare_cost()’: user.cpp:54:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<strlen(c); i++) ^ user.cpp: In function ‘void citire()’: user.cpp:94:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<strlen(c); ++j) ^ user.cpp:116:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<strlen(c); j++) ^ user.cpp: In function ‘void dijkstra(int)’: user.cpp:146:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<lista[nod].size(); i++) ^