palc.cpp: In function `void perm_s()': palc.cpp:14: warning: comparison between signed and unsigned integer expressions palc.cpp: In function `int palind()': palc.cpp:33: warning: comparison between signed and unsigned integer expressions palc.cpp: In function `int main()': palc.cpp:47: warning: comparison between signed and unsigned integer expressions palc.cpp:53: warning: comparison between signed and unsigned integer expressions palc.cpp:59: warning: comparison between signed and unsigned integer expressions