Compilare: user.cpp:27:24: warning: integer overflow in expression [-Woverflow] const int oo = (1<<31)-1; ^ user.cpp: In function ‘int main()’: user.cpp:93:49: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(((Source[a] && Sink[b]) || Source[a] && Sink[b]) && c == d) ^ user.cpp:97:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < Ans.size() ; ++ i) ^