Compilare: main.cpp: In function 'void bfs(int, int)': main.cpp:22:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<l[p].size(); i++) ~^~~~~~~~~~~~ main.cpp: In function 'int rasp(int)': main.cpp:52:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<w[x.x].size(); i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:91:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<m1.size(); i++) ~^~~~~~~~~~ main.cpp: In function 'int rasp(int)': main.cpp:62:1: warning: control reaches end of non-void function [-Wreturn-type] } ^