Compilare: user.cpp: In function ‘void bfs(int, int*)’: user.cpp:20:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[c].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:31:6: warning: statement has no effect [-Wunused-value] in>>n>>m; ^ user.cpp:32:7: warning: statement has no effect [-Wunused-value] in>>in>>sf; ^ user.cpp:36:10: warning: statement has no effect [-Wunused-value] in>>a>>b; ^ user.cpp:33:7: warning: ‘n’ is used uninitialized in this function [-Wuninitialized] out<<n; ^ user.cpp:42:14: warning: ‘in’ is used uninitialized in this function [-Wuninitialized] bfs(in,cost1); ^ user.cpp:43:14: warning: ‘sf’ is used uninitialized in this function [-Wuninitialized] bfs(sf,cost2); ^ user.cpp:34:1: warning: ‘m’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(i=1;i<=m;i++) ^