Compilare: user.cpp: In function ‘void Read()’: user.cpp:26:20: warning: unused variable ‘y’ [-Wunused-variable] int x, y; ^ user.cpp: In function ‘void precalcDP(int, int)’: user.cpp:36:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[t][node].size(); i++) ^ user.cpp: In function ‘bool DFS(int, int, int, int)’: user.cpp:48:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[a][node1].size(); i++) ^ user.cpp: In function ‘bool check(int, int)’: user.cpp:61:1: warning: control reaches end of non-void function [-Wreturn-type] } ^