Compilare: main.cpp: In function 'int main()': main.cpp:22:16: warning: unused variable 'i' [-Wunused-variable] {int st,dr,mij,i; ^ main.cpp: In function 'void dijkstra(int)': main.cpp:81:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<a[varf].size();i++) ~^~~~~~~~~~~~~~~ main.cpp:61:8: warning: unused variable 'val' [-Wunused-variable] {int i,val,now,start; ^~~ main.cpp:61:12: warning: unused variable 'now' [-Wunused-variable] {int i,val,now,start; ^~~ main.cpp:61:16: warning: variable 'start' set but not used [-Wunused-but-set-variable] {int i,val,now,start; ^~~~~