Compilare: main.cpp: In function 'int main()': main.cpp:28:16: warning: unused variable 'i' [-Wunused-variable] {int st,dr,mij,i; ^ main.cpp: In function 'void dijkstra(int)': main.cpp:73:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<a[start].size();i++) ~^~~~~~~~~~~~~~~~ main.cpp:84:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<a[x].size();i++) ~^~~~~~~~~~~~ main.cpp:65:8: warning: unused variable 'val' [-Wunused-variable] {int i,val,now,start; ^~~ main.cpp:65:12: warning: unused variable 'now' [-Wunused-variable] {int i,val,now,start; ^~~