Compilare: main.cpp: In function 'void Solve()': main.cpp:51:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<umb.size(); i++) ~^~~~~~~~~~~ main.cpp:3:12: warning: integer overflow in expression [-Woverflow] #define oo -(1<<31) ^~~~~~~~ main.cpp:52:40: note: in expansion of macro 'oo' b[umb[i].first][umb[i].second]=oo; ^~ main.cpp:75:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<umb.size(); i++) ~^~~~~~~~~~~