Compilare: main.cpp: In function 'int bfs(int, int)': main.cpp:27:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < mu[aux].size(); i++) ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void c_a(int, bool)': main.cpp:55:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < mu[j].size(); i++) ~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:71:9: warning: unused variable 'n' [-Wunused-variable] int n, m, i, x; ^ main.cpp:71:15: warning: unused variable 'i' [-Wunused-variable] int n, m, i, x; ^ main.cpp:71:18: warning: unused variable 'x' [-Wunused-variable] int n, m, i, x; ^ main.cpp: In function 'int bfs(int, int)': main.cpp:44:22: warning: 'aux' may be used uninitialized in this function [-Wmaybe-uninitialized] out<<dist[aux]; ^