links.cpp: In function `void transform()': links.cpp:24: warning: comparison between signed and unsigned integer expressions links.cpp: In function `void pregatire()': links.cpp:41: warning: comparison between signed and unsigned integer expressions links.cpp:59: warning: comparison between signed and unsigned integer expressions links.cpp: In function `void rezolvare()': links.cpp:71: warning: comparison between signed and unsigned integer expressions links.cpp:88: warning: comparison between signed and unsigned integer expressions links.cpp:94: warning: comparison between signed and unsigned integer expressions links.cpp:115: warning: comparison between signed and unsigned integer expressions