Compilare: main.cpp: In function 'void bfs()': main.cpp:76:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<dot<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 76 | for (i=0;i<st2.size();++i) { | ~^~~~~~~~~~~ main.cpp:45:5: warning: unused variable 'x' [-Wunused-variable] 45 | int x,y,i,dim; | ^ main.cpp:45:7: warning: unused variable 'y' [-Wunused-variable] 45 | int x,y,i,dim; | ^ main.cpp: In function 'int check(int, int)': main.cpp:42:1: warning: control reaches end of non-void function [-Wreturn-type] 42 | } | ^