Borderou de evaluare (job #286780)

Compilare: user.cpp: In function 'void dfsa(int)': user.cpp:28:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In function 'void dfsb(int)': user.cpp:39:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In function 'int main()': user.cpp:69:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:71:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:72:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:65:9: warning: unused variable 'k' [-Wunused-variable]