oldest.cpp: In function `void insert_position(int, int)': oldest.cpp:23: warning: comparison between signed and unsigned integer expressions oldest.cpp: In function `int search_position(int)': oldest.cpp:35: warning: comparison between signed and unsigned integer expressions oldest.cpp: In function `int main()': oldest.cpp:63: warning: comparison between signed and unsigned integer expressions oldest.cpp:71: warning: comparison between signed and unsigned integer expressions