Compilare: user.cpp: In function ‘void citire()’: user.cpp:18:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=1; k<=m; k++) ~^~~ user.cpp: In function ‘void dijkstra(int)’: user.cpp:30:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=2; i<=n; i++) ~^~~ user.cpp:39:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<a[poz].size(); i++) ~^~~~~~~~~~~~~~ user.cpp:28:11: warning: unused variable ‘mn’ [-Wunused-variable] int i,mn,poz,k; ^~ user.cpp:28:18: warning: unused variable ‘k’ [-Wunused-variable] int i,mn,poz,k; ^ user.cpp: In function ‘int main()’: user.cpp:53:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=2; i<=n; i++) ~^~~