Compilare: main.cpp: In function 'void citire()': main.cpp:27:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<v[1].size(); i++) ~^~~~~~~~~~~~ main.cpp:16:22: warning: unused variable 'j' [-Wunused-variable] int x, y, co, i, j; ^ main.cpp: In function 'void dijkstra()': main.cpp:44:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<v[minn.second].size(); j++) ~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:37:9: warning: unused variable 'i' [-Wunused-variable] int i, j; ^