universitate.cpp: In function `bool df(int)': universitate.cpp:25: warning: comparison between signed and unsigned integer expressions universitate.cpp: In function `int main()': universitate.cpp:79: warning: comparison between signed and unsigned integer expressions universitate.cpp:95:2: warning: no newline at end of file /tmp/ccrTXNv9.o(.text+0x5d3): In function `main': : the `gets' function is dangerous and should not be used.