Compilare: user.cpp: In function ‘bool BFS()’: user.cpp:50:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Aux[node].size(); i++) ~~^~~~~~~~~~~~~~~~~~ user.cpp: In function ‘int maxF()’: user.cpp:67:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Aux[cnt].size(); i++) ~~^~~~~~~~~~~~~~~~~ user.cpp: In function ‘void buildGraph(int, int, int, int, int)’: user.cpp:104:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ~~^~~~~~~~~~~~~~~~ user.cpp: In function ‘void buildGraph2(int, int, int)’: user.cpp:139:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ~~^~~~~~~~~~~~~~~~ user.cpp: In function ‘void trySolve(int, int)’: user.cpp:163:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ~~^~~~~~~~~~~~~~~~ user.cpp: In function ‘void Solve()’: user.cpp:218:14: warning: variable ‘ok’ set but not used [-Wunused-but-set-variable] bool ok = 0; ^~