alice.cpp: In function `int main()': alice.cpp:31: warning: comparison between signed and unsigned integer expressions alice.cpp:31: warning: comparison between signed and unsigned integer expressions alice.cpp:41: warning: comparison between signed and unsigned integer expressions alice.cpp:43: warning: comparison between signed and unsigned integer expressions alice.cpp:52: warning: comparison between signed and unsigned integer expressions alice.cpp:8: warning: unused variable `int xx' alice.cpp:8: warning: unused variable `int maxn' alice.cpp:8: warning: unused variable `int minn'